Loading

ZI IN CHEOL Co., Ltd.

홈 Explosion Relief Valve ZRE - explosion Relief valve for Exhaust system

ZRE - explosion Relief valve for Exhaust system

Structure

  • ZRE was made of stainless steel suitable for use in high temperature environments.
  • ZRE consists of exclusive frame arrester, spring, dual plate disc, special sealing and fittings plated nickel to optimize for the exhaust system.
  • ZRE can be kept airtight up to max.460°C temperature.

Function

  • When internal pressure of exhaust line of the engine reaches to 0.2±10% bar, The disc is opened and the excessive pressure gas releases without flames transmission to outward.
  • ZRE relief valve protects the exhaust pipes and related equipment directly installed on the exhaust system.
  • In the event of an exhaust system explosion, ZRE opens immediately to release explosion pressure and closes tightly to prevent secondary explosion by blocking oxygen from engine room.

ZRE - explosion Relief valve for Exhaust system

  • Model name : ZRE-320, ZRE-420, ZRE-565, ZRE-735
  • Opening pressure : 0.18 ~ 0.22 bar / Operating temperature : max. 500°C
  • Optimal design realized after structural analysis and thermal flow by computational fluid dynamics.
  • Exclusive and integrated frame arrestor ensures to release pressure without flame transmission.
  • Withstand explosions several times without engines shut down.
  • No periodically replacement thus low maintenance cost compare to the rupture discs.
  • No engine operation load reduction.
  • Easy to install and easy to change of flame arrester.
  • Excellent durability and ventilation.

References

  • IACS
    IACS UR Mxx; Type Testing Procedure of Explosion Relief Devices for Combustion Air Inlet and Exhaust Gas Manifolds of I.C. Engines Using Gas as Fuel.
  • Approved by
    Type approval of ZRE tested with witnesses attending DNVGL in FTZU
    FTZU(Czech Republic Austraba, International testing institute).
    Obtained DNVGL certification in May 2021
    Type approval to be expanded (ABS, GL, LR, DNV, NK, KR, KR, RINA, KR, RINA, CCS, WCH, HHI)
Competition
Separation Flame arrester which were optimally combined with lamellar and wire mesh
These enable excellent flame disconnections & improved cooling effect
Structure Stainless lamellar structures enable excellent block, stability and safety
Excellent durability to explosive pressure and in high temperature environment
Resistance The protrusion of the Lamellar is inserted at the groove of the Seat to stop any movement even during explosion
Standard Lamella and wire mesh combination design applied for all ranges of ZRE relief valves products
Strength trengthening the dual disc structure enabled open pressure to maintain even after a secondary explosion

Model(ZRE) Outflow
Area(㎠)		 ØD1(mm) ØD2(mm) ØD(mm) min(mm) h1(mm) h2(mm) H(mm) Mounting
Bolt		 P.C.D.(mm) weight(kg)
ZRE-320 731 305 355 470 81 19 126 312 6-M12 355 63
ZRE-420 1257 400 465 585 106 19 166 383 8-M16 465 116
ZRE-565 2299 541 615 735 144 19 233 476 12-M16 615 210
ZRE-735 3904 705 795 915 187 19 310 619 12-M16 795 355

The most important factors are the application of sealing that maintains air tightness even (at high temperatures) above 460°C and the development of a material that can withstand high temperatures.