Plastic Lined Industrial Valves in North Carolina
One of the largest integrated phosphate mine and chemical plants in the world sits on the Pamlico River, a biomanufacturing hub ranked second only to New Jersey sits in the Triangle, and a fluorochemical plant works hydrofluoric acid on the Cape Fear. Three very different valve problems, one answer: a fluoropolymer lining.
Marspec Technical Products supplies plastic lined valves in PFA and PTFE and fabricates the lined spools and fittings they bolt to in Fairhope, Alabama, where we have built plastic-lined piping for more than half a century. We supply Swissfluid PFA- and PTFE-lined valves and build automated valve packages in house; Swissfluid USA supports its national distribution network from its facility in Stafford, Texas. Call (251) 625-4949 or contact us online and describe the service.
Where lined valves earn their keep in North Carolina
Sulfuric, phosphoric and purified acid at Aurora
The Aurora operation in Beaufort County burns sulfur for sulfuric acid, reacts it with rock for wet-process phosphoric acid, and purifies part of that acid to food and technical grades sold on low metals content. Rock acid carries fluoride, silica and gypsum, which attack alloys and pack seats, so PFA-lined cylindrical plug valves, cavity-free and 1/2" through 6", cover transfer and evaporator feed, though grit can score the plug. The purified circuit is stricter, and PFA-lined ball and diaphragm valves with no wetted metal handle it without adding iron.
Clean-in-place and decontamination in the Triangle
The Raleigh-Durham market has been ranked second only to New Jersey as a biomanufacturing hub, with biologics plants at Holly Springs, injectables at Concord and vaccine and gene therapy work around Research Triangle Park. Plant utilities move sodium hydroxide and phosphoric acid for clean-in-place, sodium hypochlorite for decontamination, buffers and solvents. PFA-lined diaphragm valves are the natural fit: the weir drains, there is no packing or dead leg, and the lining neither corrodes nor sheds metal ions; lined sampling valves and checks complete the CIP and waste-kill systems.
Hydrofluoric acid on the Cape Fear
A fluorochemical plant in Bladen County makes fluoropolymers and monomers from chemistry that starts with hydrofluoric acid. HF attacks glass and stainless steel; PFA-lined ball valves isolate it, lined diaphragm valves with the PTFE/FPM diaphragm meter it, and neither puts metal in the stream; HF permeates the PTFE face of the diaphragm, and the FPM backing resists it. Water utilities on the lower Cape Fear dose hypochlorite, ferric and caustic through lined diaphragm valves, with vented-ball ball valves (vent facing upstream) where hypochlorite needs isolation.
Batteries, bleach plants and power
Toyota's 14-billion-dollar battery plant at Liberty handles electrolyte solvents and recovers N-methylpyrrolidone, and PFA-lined ball valves take both. Carbonate electrolyte solvents can build a static charge that pinholes a plain lining or ignites vapor, so bond and ground the spools and use anti-static PFA-AS valves; tell us if your specification calls for an anti-static liner. The pulp mills at Plymouth and Riegelwood add chlorine dioxide, chlorate and sulfuric acid for lined diaphragm and plug valves, and the coal stations add scrubber slurry. Chlorine dioxide permeates the PTFE diaphragm face too, so those diaphragm valves also get the PTFE/FPM diaphragm.
Valve types we supply
Each type is PFA-lined except the butterfly, which is PTFE-lined, with flanges that mate with ANSI B16.5 lined pipe. Sizes vary by pattern: ball valves 1/2" through 10", plug valves 1/2" through 6", diaphragm valves 1/2" through 8", butterfly valves 1" through 42", ball check and sampling valves 1/2" through 6", and swing check valves 1-1/2" through 24"; the rest is on our plastic lined valves page.
Diaphragm valves
A PTFE-faced diaphragm seals against the weir of a PFA-lined body with the stem outside the process, no packing, no dead leg, and a body that drains. The biologics and purified-acid choice.
Sampling valves
Lined sampling valves take a representative sample from a live acid, slurry or CIP line with no dead leg and no operator exposure.
Ball valves
PFA-lined body and PFA-encapsulated ball, quarter-turn and bubble-tight, for HF, purified acid, caustic and solvents, with a bore that drains clean.
Plug valves
PFA-lined cylindrical plug valves, 1/2" through 2" full port and 3" through 6" reduced port, cavity-free, with no in-line adjustment: low torque and no cavity for gypsum or other solids to pack.
Butterfly valves
PFA-encapsulated disc in a PTFE-lined wafer or lug body, 1" through 42", for filtrate, dilute acid, brine and the larger caustic lines.
Check valves
Lined ball and disc checks keep acid, hypochlorite and CIP chemicals from running back into a pump, with nothing metallic to corrode.
Automation
CIP skids and acid transfer interlocks are automated as a rule, and Marspec assembles automated valve packages in-house: pneumatic or electric actuators, positioners, limit switches and solenoids mounted on the lined valve, stroked and tested before shipment. We size the actuator from the control signal, fail position and supply you give us.
Matching valves to the lined pipe system
Our valves are meant to bolt to the lined spools we fabricate and fittings we supply, which run 1/2" through 12", lined with PTFE, PVDF or polypropylene in carbon steel or 304/316 stainless housings. Our lined pipe and fittings comply with ASTM F1545, fittings conform dimensionally to ANSI B16.5 and are welded to ASME B31.3 by welders certified to ASME Section IX, and no lined spool or fitting leaves without a spark test of at least 10,000 volts. Lined strainers from our piping accessories keep fines off a seat. Liner temperature limits, liner thicknesses, flange dimensions and torque tables are on our technical details page, and the industries are described on our North Carolina lined pipe page.
Serving Charlotte, the Triangle, Wilmington and the coast
Spools and valves ship from Fairhope, Alabama, to Charlotte, Gastonia, Kings Mountain, Raleigh, Durham, Holly Springs, Concord, Greensboro, Liberty, Winston-Salem, Fayetteville, Wilmington, Aurora, Plymouth and Roanoke Rapids. Send the valve schedule or P&ID, say which valves isolate, throttle or sample, and we will quote valves and spools together. Call (251) 625-4949 or reach us through our contact page.
FAQ: Plastic Lined Industrial Valves in North Carolina
What lined valve belongs on purified phosphoric acid at the Aurora plant?
A PFA-lined ball valve for isolation or a lined diaphragm valve for control, both with no wetted metal: the acid is sold on its low iron content, and a lined valve adds no iron at all. PFA-lined cylindrical plug valves suit the rock-acid side where gypsum and silica are the problem.
Are lined valves acceptable in a Research Triangle biologics plant?
Yes, on clean-in-place caustic and acid supply, hypochlorite decontamination, buffer preparation and waste-kill systems. PFA-lined diaphragm valves drain, have no dead leg and shed no metal ions, and material certifications ship with the order.
Can lined valves handle hydrofluoric acid at the Cape Fear fluorochemical plant?
PFA and PTFE are among the few materials that resist aqueous HF, though HF permeates them even at ambient temperature; lined ball and diaphragm valves put no metal in the stream. We confirm concentration and temperature against the lining's rating before quoting.