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

Zwick 8211 SIL 3 Emergency Shutdown Valves ESDZwick 8211 SIL 3 Emergency Shutdown Valves ESD

BRAND: ZwickCATEGORY: ESD Valves & PST, Triple Offset Valves,

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 to reduce the risk that can arise if the pressure of a system exceeds its design pressure. 

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!


SeriesEmergency Shutdown Triple Offset Valve

Triple Offset Zero Leakage butterfly valves

  • 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

50mm to 2200mm / 2” to 88”


PN16 – 100 / ANSI 150 – 900

Temperatures-196°C to +815°C
Double flanged / Lug / Wafer / Buttweld / Gate valve face to face

Carbon steel / Stainless Steel / Alloy steels / Special alloys

Resilient metal to metal
Carbon steel / Stainless Steel / Alloy steels
  • 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 &



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).


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