PP Spray Nozzle for Corrosive Applications: Material Selection Guide

A PP spray nozzle is the default choice for roughly 60 percent of corrosive chemical scrubber applications worldwide because it handles the most common scrubber chemicals at a material cost of approximately 30 percent of stainless steel 316L. A PP spray nozzle that costs $25 to $50 can deliver 5 to 8 years of reliable service in an HCl scrubber operating at 60 degC, while the same service in SS316L would cost $80 to $150 and fail from pitting corrosion within 6 to 12 months. That combination of low cost and adequate performance makes the PP spray nozzle the most economical option for dilute acid and alkali scrubbers across chemical processing, metal finishing, wastewater treatment, and pharmaceutical manufacturing.

However, PP has hard limits that must be respected or the cost advantage disappears. It softens above 80 degC, erodes rapidly in the presence of suspended solids above 200 ppm, swells and fails in aromatic solvents and chlorinated hydrocarbons, and oxidizes rapidly in concentrated nitric or sulfuric acid. Specifying PP nozzles where conditions exceed these limits causes premature failure that can release plastic debris into the scrubber system and require unscheduled shutdowns for nozzle replacement. This guide covers PP chemical resistance properties with specific compatibility data for the most common scrubber chemicals, temperature and pressure limits with quantitative derating guidelines, a comparison of PP against PVDF, PTFE, and SS316L across all relevant selection parameters, application-specific guidance for HCl, H2SO4, and NaOH scrubbers with service life data, sizing methodology and cost comparison tables, proper installation and maintenance practices, and a clear decision framework for when to upgrade to a more expensive material. The goal is to help you specify PP nozzles confidently within their operating envelope and recognize when a different material is required.

Polypropylene as a Nozzle Material

Chemical Resistance Properties

Polypropylene resists dilute mineral acids, alkalis, and many organic compounds through its semi-crystalline polymer structure. For general scrubber performance reference, the Engineering Toolbox scrubber basics guide provides nozzle and scrubber system data. The crystalline regions of the polymer are tightly packed and resist chemical penetration, while the amorphous regions allow limited chemical absorption that determines the material chemical compatibility limits. PP resists hydrochloric acid up to 30 percent concentration, sulfuric acid up to 80 percent, sodium hydroxide up to 50 percent, and most aliphatic hydrocarbons at temperatures up to 60 to 80 degC. These four chemicals HCl, H2SO4, NaOH, and aliphatic compounds cover the vast majority of wet scrubber applications.

PP does not resist concentrated oxidizing acids. Nitric acid above 10 percent concentration and sulfuric acid above 80 percent oxidize the polymer chain, breaking the carbon-hydrogen bonds and causing the material to become brittle and crack. The oxidation rate accelerates with temperature. A PP nozzle exposed to 15 percent HNO3 at 50 degC may show surface cracking within 2 to 4 weeks, while the same nozzle at 20 degC may last 6 to 12 months before embrittlement requires replacement. PP also absorbs aromatic hydrocarbons including benzene, toluene, and xylene as well as chlorinated solvents such as chloroform and carbon tetrachloride. The absorbed molecules act as plasticizers, causing the PP to swell by 5 to 15 percent by volume and lose mechanical strength. A PP nozzle that swells in contact with toluene may lose 40 to 60 percent of its tensile strength within 24 hours of exposure. For scrubbers treating exhaust from processes that use aromatic or chlorinated solvents, the recirculated liquid must be tested for trace organic content before PP nozzles are specified. Even trace levels as low as 100 ppm of toluene in the scrubber liquid can cause PP swelling over months of continuous contact.

Temperature and Pressure Limits

The maximum continuous service temperature for PP in scrubber nozzle applications is 80 degC. This limit is not arbitrary it is determined by the crystalline melting point of polypropylene, which occurs at approximately 160 degC. At 80 degC, which is half the melting temperature in Kelvin, the polymer chains in the amorphous regions gain sufficient mobility to reduce the material stiffness by approximately 50 percent compared with room temperature. The design tensile strength drops from 30 MPa at 20 degC to 15 MPa at 80 degC. Above 80 degC, the softening accelerates rapidly. Short-term excursions to 90 to 100 degC lasting less than 1 hour may be tolerated but each excursion reduces the total service life by an estimated 10 to 20 percent depending on the frequency.

The maximum operating pressure for PP nozzles is 4 bar at 20 degC, derating linearly to 2 bar at 80 degC. This derating follows the same curve as the tensile strength because the failure mode is hoop stress in the nozzle wall caused by internal pressure. At 4 bar and 80 degC, the hoop stress in a standard PP nozzle wall exceeds the derated tensile strength and the nozzle can fail by bursting. For applications requiring operating pressure above 4 bar, specify PVDF nozzles rated at 6 bar maximum or SS316L rated at 15+ bar. The relationship between temperature and pressure is linear: at 40 degC, the maximum allowable pressure is 3.4 bar and at 60 degC it is 2.7 bar. A simple rule of thumb is to subtract 0.025 bar from the maximum for each degree Celsius above 20 degC. A nozzle operating at 50 degC should be limited to 4 minus (30 times 0.025) equals 3.25 bar.

Mechanical Strength and Limitations

PP has a tensile strength of 30 MPa at 20 degC, which is approximately 6 percent of the 485 MPa tensile strength of SS316L. This low strength has three practical consequences for nozzle design. First, PP nozzles require thicker walls than metal nozzles to contain the same pressure, which reduces the available flow area for a given connection size. A 1-inch PP nozzle has an internal flow diameter of approximately 18 mm, compared with 24 mm for a 1-inch SS316L nozzle, reducing the cross-sectional flow area by 45 percent. The maximum flow rate for a 1-inch PP nozzle at 2 bar is typically 25 to 45 L/min, compared with 40 to 70 L/min for the same size in SS316L.

Second, PP has poor erosion resistance because the polymer surface is soft relative to hard particles suspended in the liquid. At a given flow velocity, PP erodes at a rate 10 to 20 times faster than SS316L and 50 to 100 times faster than ceramic. For liquids containing suspended solids, the erosion rate increases with the square of the velocity. This means that doubling the flow velocity through a PP nozzle increases the erosion rate by approximately 4 times. For scrubber liquids with suspended solids concentration above 200 ppm, PP nozzles should not be used regardless of temperature. The erosion progressively enlarges the nozzle orifice, shifting the spray pattern from the design specification to a wider, coarser spray that reduces mass transfer efficiency. A PP nozzle that has lost 15 percent of its orifice diameter due to erosion delivers approximately 30 percent more flow at the same pressure, disrupting the L/G ratio and altering the spray angle.

Third, PP is susceptible to UV degradation when exposed to sunlight. Ultraviolet radiation breaks the polymer chains at the surface, causing a chalked, brittle layer to form. This UV-damaged layer deepens at a rate of 0.1 to 0.2 mm per year of direct sunlight exposure. After 6 to 12 months of continuous outdoor exposure, PP nozzles may develop surface cracks that propagate inward under pressure cycling. For outdoor installations, UV-stabilized PP grades are required, or the nozzles must be shielded from direct sunlight. Standard black PP contains carbon black pigment that provides inherent UV protection, but natural or white PP grades used in some nozzles have no UV resistance.

PP vs Other Nozzle Materials

The selection of nozzle material depends on the specific combination of chemical composition, operating temperature, pressure, and solids content in the scrubber liquid. The table below compares PP against the three most common alternatives across all relevant parameters for corrosive scrubber service.

PP is the optimal choice for low-temperature acid and alkali scrubbers with clean liquid. PVDF is the upgrade for temperature above 80 degC, solvents, or when a safety margin beyond PP limits is desired. PTFE is the choice for extreme chemical environments up to 260 degC but requires mechanical support due to low creep resistance. SS316L is standard for high-temperature and high-pressure service where chlorides are not present.

PP Nozzle Types and Their Applications

PP nozzles are manufactured in all common spray patterns: full cone, hollow cone, flat fan, spiral, and specialized tank cleaning nozzles. PP spiral nozzles are the most popular choice for chemical scrubber service because the spiral design provides 5 to 15 mm free passage that resists clogging from occasional debris in the recirculated liquid. The open flow path of a spiral nozzle also makes it less sensitive to the thicker walls required for PP construction. The cost of a PP spiral nozzle ranges from $30 to $80 depending on the connection size and flow rate. A set of 8 spiral nozzles for a 2.0 m diameter scrubber costs $240 to $640.

PP full cone nozzles with internal swirl inserts are used in packed bed scrubbers where uniform liquid distribution across the bed surface is required. The swirl insert creates a tangentially rotating flow that emerges from the orifice as a solid cone with a distribution index of 80 to 90 percent. PP full cone nozzles are available in flow rates from 2 to 200 L/min at 2 bar with spray angles from 45 to 120 degrees. PP hollow cone nozzles produce a ring-shaped spray pattern used in spray tower absorbers where droplet size distribution rather than impact velocity determines performance. PP flat fan nozzles are used for mist eliminator washing and tank cleaning in corrosive environments. The choice between these types is determined by the scrubber design, not the material specification. Any spray pattern available in SS316L is also available in PP for the same flow and angle range, subject to the lower maximum pressure limit.

PP Chemical Compatibility Quick Reference

Maintenance of PP Nozzles

PP nozzles require different maintenance practices than metal nozzles. Never use wire brushes, scrapers, or metal tools to clean PP nozzle orifices. PP is significantly softer than metal and any scratch on the internal flow surface creates a stress concentration point where cracks can initiate and propagate under pressure cycling. A scratch as shallow as 0.1 mm in the orifice throat of a PP nozzle can reduce the fatigue life by 50 percent or more. Clean PP nozzles by chemical soaking in dilute acid for scale removal or dilute caustic for organic deposit removal, followed by low-pressure water flushing at 2 to 3 bar through the nozzle in the reverse flow direction.

Inspect PP nozzles during each scheduled maintenance shutdown for three signs of degradation. First, check for surface crazing visible as a network of fine cracks on the nozzle exterior, particularly at the thread root and around the orifice. Crazing indicates UV damage or chemical attack that has reached the limit of the material. Second, measure the orifice diameter with a pin gauge and compare with the original specification. An increase of more than 10 percent indicates erosion that requires nozzle replacement. Third, check for swelling or deformation by verifying that the nozzle threads still engage freely with the connector. A nozzle that is difficult to thread or shows signs of thread distortion has absorbed chemical and must be replaced. Store spare PP nozzles in a cool, dark, dry location away from UV sources and rotate stock so the oldest nozzles are installed first. PP stored in lighted warehouse conditions for more than 3 years may become brittle enough to crack during installation.

Applications in Corrosive Scrubbers

HCl Absorption Scrubbers

HCl scrubbers are the single most common application for PP spray nozzles. Dilute hydrochloric acid at 1 to 10 percent concentration with operating temperatures of 30 to 60 degC is well within PP chemical resistance and temperature limits. The EPA wet scrubber for acid gas design manual provides the design methodology for packed bed and spray tower HCl scrubbers where PP nozzles are the standard material choice. A PP spray nozzle in continuous HCl scrubber service typically provides 5 to 8 years of service life before orifice erosion or chemical attack requires replacement. The cost advantage over SS316L is decisive because SS316L does not offer better service life in HCl service. SS316L undergoes pitting corrosion in dilute HCl at 60 degC starting within 6 to 12 months of exposure. The pitting initiates at weld seams and surface imperfections where the passive chromium oxide layer is disrupted, and deepens at a rate of 0.1 to 0.5 mm per year depending on the chloride concentration and temperature. A PP nozzle at the same conditions shows no pitting corrosion because the polymer is chemically inert to chloride attack.

The correct nozzle selection for an HCl scrubber depends on the scrubber type. For packed bed HCl scrubbers, use PP full cone nozzles with a spray angle of 90 to 120 degrees mounted 200 to 400 mm above the top of the packing to provide uniform liquid distribution. For spray tower HCl absorbers, use PP hollow cone nozzles that produce a fine droplet spray for maximum gas-liquid contact area. Verify that the maximum operating temperature at the nozzle inlet does not exceed 75 degC, leaving a 5 degC safety margin below the 80 degC PP limit. The flow rate per nozzle should be selected so that the total recirculation flow divided by the number of nozzles is within the nozzle manufacturer recommended range for the selected spray angle. Under-sizing nozzles forces higher pressure that may exceed the PP pressure limit. A typical HCl scrubber operating at 60 degC and 2.5 bar with 8 PP full cone nozzles at 60 L/min each provides a total recirculation rate of 480 L/min which is sufficient for a 2.0 m diameter packed bed scrubber treating 10,000 to 20,000 CFM of exhaust gas.

H2SO4 Scrubbers

Sulfuric acid scrubbers present a more challenging application for PP nozzles because the concentration determines whether PP is suitable or not. For dilute H2SO4 below 80 percent concentration at temperatures below 70 degC, PP nozzles provide excellent service life of 4 to 7 years. The key operating concern is heat management. H2SO4 absorption is highly exothermic generating approximately 95 kJ of heat per mole of H2SO4 absorbed. This heat can raise the liquid temperature at the nozzle inlet by 5 to 15 degC above the bulk sump temperature depending on the recirculation rate and the inlet gas concentration. A scrubber operating with a sump temperature of 55 degC may have nozzle inlet temperatures of 65 to 70 degC, which approaches the derating threshold.

For H2SO4 service, install a temperature sensor at the nozzle header rather than relying on the sump temperature reading. If the nozzle header temperature exceeds 70 degC, either increase the recirculation rate to provide more cooling or upgrade to PVDF nozzles. At concentrations above 80 percent, H2SO4 acts as a strong oxidizing and dehydrating agent that attacks PP. The acid extracts hydrogen atoms from the polymer chain through a sulfonation reaction, causing the material to become brittle and crack within weeks or days depending on the temperature. For concentrated H2SO4 scrubbers above 80 percent, specify PVDF for temperatures up to 120 degC or PTFE for temperatures up to 200 degC. Do not use PP in any H2SO4 scrubber where the acid concentration can exceed 80 percent even during upset conditions.

NaOH Caustic Scrubbers

PP nozzles handle sodium hydroxide solutions up to 50 percent concentration at temperatures up to 80 degC. PP is resistant to caustic environments and does not suffer from the caustic stress corrosion cracking that affects SS316L in caustic service above 60 degC and 10 percent concentration. In SS316L, caustic SCC occurs when the metal is under tensile stress in a caustic environment, causing intergranular cracking that can propagate through the nozzle wall within 2 to 6 months. PP has no such failure mechanism because the polymer is not subject to stress corrosion. For NaOH scrubbers operating at 40 to 70 degC with 5 to 20 percent caustic concentration, PP nozzles provide 3 to 6 years of service life.

At caustic concentrations above 50 percent, the solution viscosity increases significantly. A 50 percent NaOH solution at 20 degC has a viscosity of approximately 80 centipoise compared with 1 centipoise for water. This high viscosity affects the spray pattern by reducing the effective spray angle and increasing the droplet size. A PP full cone nozzle that produces a 90-degree spray pattern with water will produce a 60 to 70 degree spray pattern with 50 percent NaOH at the same pressure. Verify the spray performance at the actual operating viscosity with the nozzle manufacturer before specifying. The flow rate at a given pressure also decreases because the higher viscosity reduces the discharge coefficient of the nozzle orifice. A PP nozzle delivering 60 L/min of water at 2 bar may deliver only 35 to 40 L/min of 50 percent NaOH at the same pressure.

Services Where PP Nozzles Must Not Be Used

PP nozzles are unsuitable for the following scrubber services and specifying them in these conditions guarantees premature failure. Any application with an operating temperature above 80 degC even intermittently. Concentrated nitric acid above 10 percent concentration at any temperature. Concentrated sulfuric acid above 80 percent at any temperature. Any halogenated solvent including chloroform, carbon tetrachloride, perchloroethylene, and trichloroethylene. Aromatic hydrocarbons including benzene, toluene, xylene, and styrene. FGD scrubber slurry or any liquid containing suspended solids above 200 ppm. High-pressure systems where the nozzle inlet pressure exceeds 4 bar. Fire protection or deluge systems where the low melting point of PP at approximately 160 degC creates a fire safety hazard. Thermal cycling applications where the scrubber temperature repeatedly crosses the 80 degC threshold such as batch processes that heat the scrubber during active cycles and cool it during idle periods. For any of these conditions, specify PVDF, PTFE, SS316L, ceramic, or Hastelloy C276 depending on the specific combination of temperature, chemical, and pressure.

Upgrade Paths When PP Limits Are Exceeded

When a scrubber service exceeds PP limits, the correct upgrade depends on which specific limit is exceeded. If temperature is the only exceeded condition with the operating range between 80 and 150 degC, upgrade to PVDF at 0.8 times the cost of SS316L. PVDF provides the same broad chemical resistance as PP but extends the temperature limit to 150 degC. If the application involves solvents or oxidizing acids that attack PP, upgrade to PTFE at 1.5 times SS316L cost for the broadest chemical resistance up to 260 degC. If solids above 200 ppm are present, upgrade to SS316L for moderate abrasion or ceramic for severe abrasion. Silicon carbide ceramic spiral nozzles are the standard choice for FGD scrubber service where limestone slurry at 5 to 20 percent solids erodes PP nozzles within 2 to 4 weeks. If pressure above 4 bar is required, upgrade to SS316L rated at 15+ bar or to PVDF rated at 6 bar if chemical resistance requirements favor PVDF over metal. In each case, select the minimum upgrade that addresses the specific exceeded condition rather than over-specifying. If temperature is the only limit exceeded, PVDF at 0.8x cost is sufficient. There is no need to specify PTFE at 1.5x cost or Hastelloy at 4.0x cost unless multiple limits are exceeded simultaneously.

PP Nozzle Installation Practices

PP nozzles require installation practices that differ from metal nozzles in four important ways. First, use PTFE thread seal tape exclusively. Never use pipe dope, thread sealant compounds, or any solvent-based adhesive on PP threads. The solvents in these products attack PP, causing localized swelling and cracking that creates a leak path over time. Apply PTFE tape in the direction of thread rotation with 2 to 3 wraps. Second, tighten PP nozzles by hand until snug, then advance no more than 1/4 turn with a wrench. Over-tightening is the most common cause of PP nozzle failure during installation. The plastic threads do not gall like metal threads, so there is no tactile feedback when the tightening limit is reached. A nozzle that is over-tightened may develop hairline cracks at the thread root that are not visible externally but grow under pressure cycling until the nozzle leaks or separates.

Third, provide thermal expansion accommodation when PP nozzles are installed in vessels operating above 60 degC. The coefficient of thermal expansion for PP is approximately 100 micrometers per meter per degree Celsius, which is 5 to 7 times higher than steel. A PP nozzle header that is 2 meters long at 20 degC will expand by approximately 12 mm when heated to 80 degC. If the header is rigidly fixed at both ends, this expansion creates compressive stress on the nozzles that can cause buckling or thread damage. Use flexible hose connections or expansion loops between the fixed header and the nozzles in high-temperature scrubbers. Fourth, for outdoor installations, shield PP nozzles from direct sunlight or specify UV-stabilized black PP. Standard natural or white PP exposed to direct sunlight becomes brittle within 6 to 12 months. Black PP containing carbon black pigment has inherent UV resistance and is suitable for outdoor use.

PP Nozzle Sizing and Cost Comparison

The flow capacity of a PP nozzle at a given pressure follows the standard k-factor relationship where flow rate Q in L/min equals k times the square root of pressure P in bar. The k-factor for a PP nozzle of a given connection size is 30 to 40 percent lower than for the same size in SS316L because the thicker walls required to contain the pressure reduce the internal flow area. A 1-inch PP full cone nozzle with a 90-degree spray angle has a k-factor of 20 to 30, compared with 30 to 50 for a 1-inch SS316L nozzle. The table below provides flow rates and costs for standard PP and SS316L full cone nozzles at 2 bar operating pressure.

For a 2.0 m diameter chemical scrubber requiring 8 nozzles at 60 L/min each at 2 bar, the correct PP selection is the 1.5-inch nozzle delivering 50 to 90 L/min at a cost of $40 to $80 each. The total PP nozzle cost is 8 times $60 average equals $480. The SS316L equivalent would be a 1-inch nozzle delivering 40 to 70 L/min at $80 to $150 each, totaling 8 times $120 equals $960. The PP option saves $480 or 50 percent of the nozzle capital cost. For larger scrubbers with 20 to 40 nozzles, the saving scales to $1,200 to $2,400. These savings do not include the additional cost of SS316L headers and fittings that are required when using SS316L nozzles. PP nozzles can be installed in less expensive PP or PVC headers, increasing the total system saving.

FAQ

What is the maximum temperature for PP spray nozzles?

80 degC continuous service. Above this temperature, PP softens and loses approximately 50 percent of its room-temperature mechanical strength. The maximum safe operating pressure derates from 4 bar at 20 degC to 2 bar at 80 degC. For temperatures above 80 degC, upgrade to PVDF with a 150 degC limit or PTFE with a 260 degC limit.

Can PP nozzles handle hydrochloric acid?

Yes. PP resists HCl at all concentrations up to 80 degC. PP nozzles in HCl scrubber service typically last 5 to 8 years. In this service, PP actually outperforms SS316L because PP is immune to chloride pitting corrosion that destroys SS316L within 6 to 12 months. PP is the standard nozzle material for HCl scrubbers worldwide.

What is the cost advantage of PP nozzles over SS316L?

PP nozzles cost approximately 30 percent of equivalent SS316L nozzles. For a 2.0 m scrubber with 8 nozzles, the saving is $400 to $600. For larger scrubbers with 20 to 40 nozzles, the saving scales to $1,200 to $2,400. PP nozzles also allow the use of less expensive PP or PVC headers, increasing the total system saving.

When should I NOT use PP nozzles?

Do not use PP nozzles above 80 degC, above 4 bar pressure, in concentrated oxidizing acids such as HNO3 above 10 percent or H2SO4 above 80 percent, in halogenated solvents, in FGD slurry or any liquid with suspended solids above 200 ppm, or in fire protection systems. For these conditions, specify PVDF, PTFE, SS316L, ceramic, or Hastelloy C276 depending on the specific condition.

How does PP flow capacity compare with SS316L?

PP nozzles have 30 to 40 percent lower flow capacity than SS316L nozzles of the same connection size because the thicker PP walls reduce the internal flow area. To match the flow rate of a 1-inch SS316L nozzle, use a 1.5-inch PP nozzle. The cost for the larger PP nozzle is still lower than the smaller SS316L nozzle.

Can PP nozzles be used in FGD scrubbers?

No. FGD scrubbers handle limestone slurry with suspended solids at 5 to 20 percent concentration. The solids rapidly erode PP nozzles with a service life measured in weeks rather than years. Use silicon carbide ceramic spiral nozzles for FGD service. Ceramic nozzles provide 5 to 10 years of service life in FGD slurry at a cost of 2 to 3 times that of PP.

How should PP nozzles be installed?

Use PTFE thread seal tape only. Tighten by hand plus 1/4 turn with a wrench over-tightening cracks the plastic threads. For vessels operating above 60 degC, allow for thermal expansion of the PP using flexible hose connections. For outdoor installations, use UV-stabilized black PP or provide sun shielding.

How do I inspect PP nozzles during maintenance?

Check for surface crazing at the thread root and around the orifice. Measure the orifice diameter with a pin gauge if it has enlarged by more than 10 percent, the nozzle must be replaced. Check thread condition if the nozzle is difficult to thread or shows distortion, it has absorbed chemical and must be replaced.

What is the storage life of PP nozzles?

PP nozzles stored in a cool, dark, dry location away from UV sources have a storage life of 3 to 5 years. Even warehouse lighting can cause PP surface embrittlement over extended periods. Rotate stock so the oldest nozzles are installed first and inspect stored nozzles for surface crazing or discoloration before installation.

Conclusion

PP spray nozzles are the most cost-effective solution for low-temperature corrosive scrubber services where the liquid is clean with solids below 200 ppm and the operating temperature stays below 80 degC. In HCl absorption, dilute H2SO4 scrubbing, and NaOH caustic scrubbing, PP nozzles provide 3 to 8 years of service life at 30 percent of the cost of SS316L. In HCl service, PP actually outperforms stainless steel because it is immune to chloride pitting corrosion and caustic stress corrosion cracking. The key to successful PP nozzle specification is respecting the operating envelope: 80 degC maximum temperature, 4 bar maximum pressure, no concentrated oxidizing acids, no aromatic or chlorinated solvents, and no abrasive solids. For services that exceed any of these limits, PVDF for temperature up to 150 degC, PTFE for chemical resistance up to 260 degC, SS316L for pressure above 4 bar, and ceramic for abrasive slurries each provide a defined upgrade path at a predictable cost increase. The complete nozzle selection methodology including all materials, spray patterns, and sizing calculations is covered in the spray nozzle selection guide for wet scrubbers. For detailed material data covering PVDF, PTFE, SS316L, and ceramic in addition to PP, see the industrial spray nozzle materials guide. XICHENG EP LTD supplies spray nozzles in PP, PVDF, PTFE, SS316L, ceramic, Hastelloy C276, and titanium in all spray patterns and flow ranges from 2 to 1,000 L/min. Contact our applications engineering team for nozzle material selection assistance for your specific scrubber conditions.