Zwick

Zwick – (SIL 3) Emergency Shutdown Valves (ESD)

Zwick Emergency Shutdown Valves (ESD) with Partial Stroke Testing (PST) solutions are designed to meet the requirements and standards of High Integrity Protection Systems (HIPPS). HIPPS is a type of safety instrumented system (SIS) designed...

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About Zwick – (SIL 3) Emergency Shutdown Valves (ESD)

A need for HIPPS valve solutions are typically found in industries such as Synthetic Fuels, Chemicals as well as Oil & Gas. Whether the application is in a chemical processing plant or a refinery, containing the loss due to over pressurisation is of critical importance. Heavy duty SIL 3 scotch yoke actuators with a closing time of <1 sec are readily available. Should pressures in a chemical process plant be exceeded, hazardous, explosive or toxic chemicals may be released into the atmosphere threatening lives and endangering process plant and the environment.

Our Valve Repair Centres in Secunda and Durban provide a full valve repair and reconditioning service as well as valve automation to assemble and test your valve packages.

Contact one of our technical specialists today who can assist you with the right ESD solution!

Series	Emergency Shutdown Triple Offset Valve
Design	Triple Offset Zero Leakage butterfly valves
Features	SIL3 Certified ZERO leakage bi-directional shut-off Resilient metal to metal seats Quarter turn friction free operation – No seat rubbing Self-centering torque seated disc – True cone in cone sealing Temperature compensating – No shaft to disc pins Supported bearing bushing for optimal shaft support Anti blow-out shaft Closing in < 1 sec
Size Range	50mm to 2200mm / 2” to 88”
Pressure Rating	PN16 – 100 / ANSI 150 – 900
Temperatures	-196°C to +815°C
End Connections	Double flanged / Lug / Wafer / Buttweld / Gate valve face to face
Body Materials	Carbon steel / Stainless Steel / Alloy steels / Special alloys
Seat Materials	Resilient metal to metal
Ball Materials	Carbon steel / Stainless Steel / Alloy steels
Standards	Material and/or pressure test reports with cert. to EN 10204 / 3.1 Fire Safe acc. API 607 4th ed. and B.S. 6755 for both directions CE-Certificate acc. to 2014/68/EU Anti blow-out shaft API 609 Leakage testing to API 598 and/or DIN EN 12266-1 Fugitive emissions to TA-LUFT 1 & 2 / VDI 2440 BAM-Approval for Oxygen Mounting bracket acc. to ISO 5211
Options & Accessories	Heavy duty fast acting pneumatic actuators Partial Stroke testing & ESD Instrumentation Filter regulators and volume boosters Sealed bearings Solid or laminated seal ring High cycle bearings Steam jackets Degreased for oxygen
Applications	Where you are looking for a fast acting, light weight, triple offset rotary valve that also provides zero leakage for Shutdown and Emergency Shutdown (ESD) applications in Synthetic Fuels, Chemical as well as Oil & Gas industries. High Integrity Protection Systems (HIPPS).