Swissfluid lined ball, butterfly, plug, diaphragm, swing check and ball check valves

Plastic Lined Valves

Industrial-Quality Plastic Lined Valves

Nationwide distributor of

Plastic lined valves combine the strength of a metal housing with the corrosion resistance of engineered fluoropolymers such as PFA and PTFE. PFA, like PTFE, is sold under the Teflon trade name, so a “Teflon-lined” valve is usually a PFA-lined one. The result is a flow control solution built to withstand aggressive chemicals, high temperatures and abrasive slurries, with smooth internal surfaces for low pressure drop and a long service life with minimal maintenance.

Swiss quality, domestic stock. Marspec supplies lined valves and sampling systems made by Swissfluid of Lenzburg, Switzerland, a manufacturer that specializes in lined valves for highly corrosive and abrasive service. Swissfluid USA supports its national distribution network from its facility in Stafford, Texas, so standard valves come from domestic stock rather than from Switzerland. They ship from Fairhope, Alabama, and we quote the lead time with the price. Every valve below bolts up to the same ANSI B16.5 class 150 flange pattern as our lined pipe and fittings, so the parts that have to seal against each other come from one supplier.

Call Marspec at (251) 625-4949 or request a quote if you need more specific information or would like to place an order.

Download the Valve Catalog (PDF)Every Swissfluid series below with its design data, dimensions, pressure-temperature chart and ordering code, in one file for your desk or the shop.

Common to the Swissfluid line

Bodies in epoxy-coated ASTM A216 WCB cast steel or CF-8M (AISI 316) stainless
PFA linings standard; PFA-AS anti-static, PVDF, ETFE and PTFE by model
Flanges to ASME B16.5 (ANSI 150 lb; some 300 lb) and EN 1092
Face-to-face to ASME B16.10 and EN 558-1
Leak tested to EN 12266-1 and API 598
ISO 5211 top flange for direct actuator mounting on quarter-turn valves
Material test reports and inspection certificates per EN 10204 on request
Automated valve packages built and shop tested in-house at Marspec: any brand or configuration of quarter-turn valve with any combination of actuator, solenoid and positioner

Ball Valves — Swissfluid SBV

Lined ball valves combine a robust two-piece metal body with a fully encapsulated ball. The SBV's blowout-proof one-piece ball-stem assembly and metal-to-metal body joint give bubble-tight shut-off in chemical transfer lines, industrial gas systems and wastewater treatment, with quick quarter-turn on/off operation.

Swissfluid SBV lined ball valve with lever — SBV lined ball valve

Sizes	Full port ½", ¾", 1", 1¼", 1½", 2", 2½", 3", 4", 6", 8" and 10"; reduced port 5", 6", 8" and 10". SBV 300 (Class 300 rated) in 1", 1½", 2" and 3".
Pressure	Class 150: 0.01 to 232 psi (1 mbar to 16 bar); 145 psi from 8" full port up (8" full port, 10" reduced and full port). SBV 300 (1" to 3"): 0.01 to 725 psi. Both depending on size and temperature
Temperature	−40 °F to +400 °F, depending on lining
Body	Two-piece, metal-to-metal; epoxy-coated ASTM A216 WCB cast steel or CF-8M (AISI 316) stainless
Liner & ball encapsulation	PFA standard; PFA-AS anti-static, PVDF or ETFE
Ball-stem	A PFA- or PFA-AS-encapsulated duplex core as standard; PVDF or ETFE encapsulation, or solid titanium Gr. 2 or 7, Alloy C-276 or ceramic, optional. Full-port cylindrical passage standard; V-port balls for control; C and Cs balls drain the ball cavity fully; vented balls (½" to 6") relieve pressure to the upstream side
End connections	Flanged, ASME B16.5 / EN 1092; face-to-face ASME B16.10 / EN 558-1
Operation	Lever; ISO top flange for direct mounting of pneumatic or electric quarter-turn actuators
Standards	Leak test EN 12266-1 (leakage rate A) and API 598; TA Luft stem sealing; PED 2014/68/EU

Datasheet (PDF): SBV

Cylindrical Plug Valves — Swissfluid SCP

Plastic lined plug valves use a cylindrical plug that rotates to control flow. The SCP's cavity-free design gives maximum flow with minimal pressure loss and low operating torque, and the lined interior protects against corrosive media. They are a common choice in chemical and petrochemical plants where reliable isolation is essential and space is limited.

Swissfluid SCP lined cylindrical plug valve with pneumatic actuator — SCP lined plug valve, shown with SPA-R actuator

Sizes	Full port ½", ¾", 1", 1½" and 2"; reduced port 3", 4" and 6".
Pressure	1 mbar to 16 bar (0.01 to 232 psi)
Temperature	−40 °F to +400 °F, depending on lining
Body	Two-piece body with bolted bonnet; epoxy-coated ASTM A216 WCB or CF-8M (AISI 316) stainless
Liner & plug	PFA or PFA-AS lining; one-piece cylinder with a duplex core, encapsulated in PFA, PFA-AS, PVDF, polypropylene or ETFE, or solid 316L, titanium Gr. 2 or 7 or alloy C-276
Ports	Unobstructed cylindrical standard; V-port for control; vented cylinders relieve pressure to the upstream side
End connections	Flanged, ASME B16.5 / EN 1092; face-to-face ASME B16.10 / EN 558-1 row 1
Operation	Blowout-proof one-piece cylinder-stem with notched breaking point; ISO 5211 top flange for direct actuator mounting
Standards	Leak test EN 12266-1 and API 598; TA Luft stem design

Datasheet (PDF): SCP

Butterfly Valves — Swissfluid SBP & SBE

Lightweight yet strong, lined butterfly valves are designed for large-diameter flow control with quick quarter-turn operation, low pressure drop and cost-effective installation in new and retrofit systems. The SBP has a fluoropolymer liner for acids, caustics and solvents; the SBE has an elastomer liner with a solid duplex or fluoropolymer-encapsulated disc, for shut-off, flow control and throttling of corrosive and abrasive process media. Both have a blowout-proof one-piece disc-stem; the SBP a wide, chambered flange face, the SBE a corrugated one.

Swissfluid SBP fluoropolymer lined butterfly valve with gear operator — SBP, fluoropolymer liner

Swissfluid SBE elastomer lined butterfly valve with gear operator — SBE, elastomer liner

Sizes	SBP: 1", 1¼", 1½", 2", 2½", 3", 4", 5", 6", 8", 10", 12", 14", 16", 18", 20", 24", 28", 30", 32", 36" and 42" (DN 25 to DN 1000). SBE: 1½", 2", 2½", 3", 4", 5", 6", 8", 10", 12", 14", 16", 18", 20", 24", 28" and 32".
Pressure	ANSI 150 lb or DIN PN10/16; 1 mbar to 16 bar (0.01 to 232 psi)
Temperature	SBP −40 °F to +450 °F; SBE −40 °F to +400 °F; depending on lining
Style	Wafer or lug
Body	Epoxy-coated ASTM A216 WCB, CF-8M or AISI 316L
Liner	SBP: PTFE, PTFE-AS anti-static, PTFE-T, UHMWPE or PVDF (elastomer-backed). SBE: EPDM, white EPDM, NBR, FPM (Viton), silicone or SBR
Disc	Duplex stainless core, mechanically locked in PFA, PFA-AS, ETFE, PVDF or polypropylene encapsulation; polished duplex, 316L, titanium Gr. 2 or 7 or alloy C available, plus zirconium or tantalum on the SBP
End connections	Fits ASME B16.5 / EN 1092 flanges; face-to-face ASME B16.10 / EN 558-1 row 20
Operation	Lever or gear; integrated ISO 5211 flange for direct mounting of pneumatic or electric actuators
Standards	Leak test EN 12266-1 and API 598; TA Luft shaft sealing to order

Datasheets (PDF): SBP · SBE

Diaphragm Valves — Swissfluid SDV

Plastic lined diaphragm valves are popular where precise throttling and shut-off control are required. A flexible diaphragm acts as a barrier between the process fluid and the valve components, eliminating contamination risks. The SDV is a fully lined weir-type valve for shut-off or throttling of corrosive liquids and gases. It is cavity-free, so it also suits high-purity service, it drains in any installed position, and its components are easy to replace on site.

Swissfluid SDV lined weir-type diaphragm valve with handwheel — SDV lined diaphragm valve

Sizes	½", ¾", 1", 1¼", 1½", 2", 2½", 3", 4", 5", 6" and 8" (DN 15 to DN 200)
Pressure	0.19 psia to 232 psi. Maximum by size: ½" to 2" 232 psi; 2½" 145 psi; 3" 116 psi; 4" to 6" 102 psi; 8" 73 psi
Temperature	−22 °F to +302 °F (−30 °C to +150 °C), depending on liner
Type	Weir type, fully lined, cavity-free and self-draining
Body	ASTM A216 WCB cast steel standard; CF-8M (AISI 316) stainless optional
Liner	PFA or PFA-AS anti-static standard; PVDF, ETFE or polypropylene optional
Diaphragm	PTFE/EPDM standard; PTFE/FPM optional
End connections	ANSI (ASME B16.5, MSS SP-88) or DIN (EN 1092, EN 558-1 range 1)
Operation	Handwheel; pneumatic stroke actuators (polypropylene or steel housings) or a sliding spindle for other actuators; E/P or pneumatic positioner for control duty
Maintenance	Components replaceable on site

Datasheet (PDF): SDV

Check Valves & Sight Glasses — Swissfluid SBC, SSC, SSP & SST

Plastic lined check valves allow fluid to flow in one direction only, protecting pumps, compressors and piping from backflow. The SBC ball check has a solid or hollow PTFE ball in glass-fiber-reinforced PTFE guides, with large sight-glass plates, for liquid process media; it typically sits ahead of a pump. The SSC swing check is a wafer valve with centering lugs and a tilted, self-retaining disc that closes by gravity even when the pipe is not quite level, with an integrated sealing lip for low differential pressures. Both install horizontally or vertically.

Swissfluid SBC lined ball check valve with sight plates — SBC ball check, with sight plates

Swissfluid SSC lined wafer swing check valve — SSC wafer swing check

Sizes	SBC: ½", ¾", 1", 1½", 2", 2½", 3", 4" and 6"; other sizes on request. SSC: 1½", 2", 3", 4", 6", 8", 10", 12", 14", 16", 18", 20" and 24".
Pressure	SBC 0.01 to 145 psi (10 bar); SSC 0.01 to 145 psi (10 bar) per the pressure-temperature chart, Class 150 or 300; both depending on size and temperature
Temperature	−40 °F to +400 °F, depending on lining
Body	ASTM A216 WCB standard; CF-8M (AISI 316) stainless optional
Liner	PFA or PFA-AS anti-static, mechanically locked
Closure	SBC: solid PTFE ball standard; hollow PTFE ball optional (87 psi maximum). SSC: PFA-encapsulated duplex disc; solid 316L, titanium Gr. 2 or alloy C
End connections	SBC flanged, ANSI 150 or PN 16/40; SSC wafer with centering lugs. Face-to-face ASME B16.10; EN 558-1 series 1 (SBC) and series 20 (SSC)
Window plates	SBC: borosilicate glass sight plates (DIN 7080) for a visual flow check, or blanking plates

Sight glasses — SSP, SST, SSP-T & SST-T

A sight glass next to a check valve or on a pump discharge confirms that the line is flowing, and in which direction. The SSP has a lined cast-steel body and the SST a stainless body, each with a sight plate in a flanged housing. The tubular SSP-T and SST-T show the full stream through a glass cylinder between two flanges, for watching colour, clarity or bubbles.

Swissfluid SSP lined sight glass, cast steel — SSP

Swissfluid SST lined sight glass, stainless — SST

Swissfluid SSP-T tubular sight glass — SSP-T tubular

Swissfluid SST-T tubular sight glass — SST-T tubular

Sizes	SSP: ½", ¾", 1", 1½", 2", 2½", 3", 4" and 6". SST: the same plus 1¼". SSP-T: ½", ¾", 1", 1½", 2", 3", 4" and 6". SST-T: the same. Other sizes on request.
Pressure	SSP and SST 0.01 to 232 psi, depending on size and temperature. Tubular: 232 psi through 2", 189 psi at 3", 160 psi at 4", 102 psi at 6"
Temperature	SSP −40 °F to +400 °F; SST −40 °F to +450 °F; SSP-T and SST-T +14 °F to +320 °F standard (−40 °F to +392 °F by material)
Body	SSP: cast steel or CF-8M, PFA or PFA-AS lined. SST: stainless steel, unlined. Tubular versions in lined (SSP-T) or stainless (SST-T) construction
End connections	Flanged ASME B16.5 Class 150 standard; Class 300, PN 16/40 and JIS 10K on the SSP and SST. Face-to-face to ASME B16.10 (SSP, SSP-T); SST to EN 558-1 range 1, ANSI lengths on request

Datasheets (PDF): SBC · SSC · SSP · SSP-T · SST

Sampling Valves — Swissfluid SIV & SSB

For safe, representative sampling of process fluids, lined sampling valves keep samples away from metal surfaces and protect operators from exposure to hazardous chemicals. The SIV inline sampling valve installs directly in the pipeline or a bypass and takes a sample without interrupting the process, under pressure or vacuum. The SSB inline sampling ball valve draws a predetermined volume, even a very small one, and isolates the sample from line pressure once taken, so vacuum sampling is possible. Closed sampling uses a needle adapter into a septum-topped bottle; safety cabinets and activated-carbon filters are available for hermetic systems.

Swissfluid SIV inline sampling valve mounted on a safety cabinet — SIV inline sampling valve, with safety cabinet

Swissfluid SSB inline sampling ball valve with sample bottle — SSB sampling ball valve

Sizes	SIV: ½", ¾", 1", 1½", 2", 3", 4" and 6", flanged or wafer. SSB: ½", ¾", 1", 1½", 2", 3", 4" and 6".
SIV pressure	ANSI 150 lb standard, 300 lb or DIN PN16/40 optional; 0.01 psia to 580 psi depending on size, material and temperature (232 psi with the collector, 145 psi with the piston injector)
SIV temperature	−40 °F to +400 °F, depending on lining material
SIV body	CF-8M or 316L stainless, unlined or lined with PFA or PFA-AS; spindle 316L or alloy C
SIV connections	Flanged ASME B16.5 / EN 1092, face-to-face ASME B16.10 / EN 558-1; compact wafer version with 62 mm (2.44") face-to-face
SSB pressure / temperature	Up to 232 psi; −40 °F to +300 °F lined, to +400 °F unlined; fixed sample volume of about 40 ml
SSB body	CF-8M (AISI 316) stainless, PFA or PFA-AS lined, or unlined; ball encapsulated in ETFE or PFA-AS, or solid 316L or Alloy C-276; full-port, dead-space-free for easy purging
SSB mounting	Block flange for pipe or vessel mounting; butt-weld ends or clamp connections optional
Options	Needle adapters, piston injector with glass enclosure, heating jackets, SSO-TA heat exchanger for cooling hot samples, safety cabinets, activated carbon filters
Systems	SSO-C combined systems, SSO-S sampling stations with forced control, SSO-P multi-line sampling systems

Datasheets (PDF): SIV · SSB

Reactor Sampling Systems — Swissfluid SRS

Mounted on top of a reactor or vessel, SRS systems draw a representative liquid sample through a PTFE or PTFE-AS lined dip pipe. The SRS-P uses the vessel's own vacuum or pressure; the SRS-P-E adds an inert-gas ejector for vessels with neither; the SRS-P-P adds an air-driven diaphragm pump to circulate the media continuously, with electrodes for pH, redox or temperature measurement that are easy to install, replace and clean. Not for boiling media; special loop systems are offered for those.

Connections	Media containers flanged ANSI 150 lb and DIN PN16/40 (ASME B16.5 / EN 1092)
Dip pipe	Lined with virgin PTFE or PTFE-AS; straight or bent to specification
Compliance	Components and linings meet FDA requirements; TA Luft (VDI 2440) and ATEX per Swissfluid's declarations; EN 10204 certificates on request
Options	Supplementary diaphragm, ball or plug valves; see also Vessels & Columns

Swissfluid SRS-P manual reactor sampling system — SRS-P, vessel pressure or vacuum

Swissfluid SRS-P-E reactor sampling system with inert-gas ejector — SRS-P-E, with inert-gas ejector

Swissfluid SRS-P-P automated reactor sampling system with diaphragm pump — SRS-P-P, with circulating pump

Datasheet (PDF): SRS

Actuators & Valve Automation

Swissfluid pneumatic actuators

Swissfluid SPA-R quarter-turn actuators mount directly on the ISO 5211 top flange of SBV, SCP, SBP and SBE valves without brackets or couplers. SPA-L stroke actuators serve the SDV diaphragm valve. Electric actuators and positioners for control duty are available; ask us to size the actuator to your supply pressure and safety factor.

Swissfluid SPA-R pneumatic quarter-turn actuator with positioner — SPA-R quarter-turn, with positioner

Swissfluid SPA-L pneumatic stroke actuator with solenoid valve — SPA-L stroke, for SDV

Custom valve packages, built in-house at Marspec

Don't see what you need here? Marspec's in-house automation services can join any brand or configuration of quarter-turn valve with any combination of actuator, solenoid and positioner. We build our own brackets and couplings in house to support even the most unusual configurations. Every package is shop tested before it leaves.

Not sure what the package should include? Send the service conditions (the list under Selecting a Valve) and we will recommend one. Request a quote and choose Automated valve package on the line.

A Marspec technician mounting a pneumatic actuator and positioner on a lined ball valve at the shop bench — Actuator and positioner going onto a lined ball valve in our shop

Two large pneumatic actuators mounted on plug valves, tagged with Marspec nameplates, on a pallet ready to ship — Two actuated plug valves, tagged and palletized for shipment

An automated lug butterfly valve on a pallet, loaded by forklift onto a customer's pickup — An automated butterfly valve package heading out the gate

Datasheet (PDF): Automated valve packages

Spacers & Installation

Install a ½" thick spacer, in PTFE, PVDF or polypropylene to match the liner, between plastic lined pipe or fittings and a lined valve when the diameters of the raised faces differ, and tighten to the lowest recommended torque of the components in the joint. Solid and armored spacers are listed under Spacers on the Pipe & Fittings page; torque values and the full procedure are on the Technical Details page.

Selecting a Valve

Choosing the right valve can be challenging when you are dealing with aggressive chemicals or extreme operating conditions. Our team works with you to recommend the right valve, liner and encapsulation for each service. With the full Swissfluid range available, we cover a wide spectrum of needs and help you keep your operation running safely and efficiently.

What to send us

Media, concentration, temperature and pressure (and vacuum, if any)
Solids: any slurry, grit or particulate in the line, and roughly how much
Line size and flange class
On/off, throttling, backflow or sampling duty
Manual or actuated
Anti-static lining if the media is flammable or the area is classified
Quantity and need-by date

For an automated package, add

The valve, if it is not one of ours: make, model and size of any quarter-turn valve
Fail position: fail open, fail closed or fail last
Air supply pressure, or electric supply voltage
Control signal (discrete, 4–20 mA) and solenoid coil voltage
Feedback: limit switches or position transmitter
Hazardous-area rating, if any

Request a Valve Quote Call (251) 625-4949