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ZI IN CHEOL Co., Ltd.

홈 Explosion Relief Valve Crankcase Relief Valve

Crankcase Relief Valve

Structure

  • AS internal pressure of the main engine & generator have became more than 0.05bar, The disc is opened and the excess pressure gas are emitted without flames.
  • Crankcase relief valve disconnects oil & gas and prevents the emission of flames.
  • Crankcase relief valve returns oil disconnected to the inside crankcase.

Function

  • Crankcase relief valve protect man and engines in the event of an explosion of diesel engines.
    In the event of an explosion. Relief valve opens immediately to protect the crankcase damage thus preventing a secondary explosion.
  • Crankcase relief valve closes absolutely tight after explosion thus preventing oxygen or dirt to get entrained into the crankcase.

ZiInCheol - Crankcase explosion relief valve

  • Crankcase relief valves type HWG protect man and engine in the event of an explosion
  • The safe and reliable operation of the engine
  • Continuous operation after an explosion
  • Quick emission of over-pressure in main engine and generator
  • Quick reaction in case of explosions and immediate closing thus preventing a secondary explosion
  • Virtually maintenance free
  • Special flame separation and cooling system
  • Excellent durability to explosive pressure
  • Excellent ventilation and combination device
  • All standard range components are made of carbon steel
  • Easy-to-install
  • Easy-to-change of flame arrester after an explosion.
  • The standard range’s specific opening pressure amounts to 0.05 bar ± 20%
  • The tested valve of ZiInCheol maintains an opening pressure within 0.04 bar ± 20%

References

  • IACS
    IACS UR M9 : Crankcase explosion relief valves for crankcases of internal combustion engines.
    IACS UR M10 : Protection of internal combustion engines against crankcase
    IACS UR M66 : Type Testing Procedure for Crankcase Explosion Relief Valves
  • MAN B&W Quality Controls;
    No 0742838-0; Crankcase Relief Valve.
    No 0742839-2; Type Approval Test of Crankcase Relief Valve.
  • Approved by
    Type tested relief valves regarding 6 models with witnesses attending MAN, GL,LR , HHI in FTZU
    Type approval-MAN, Wartsila, GL, LR, BV, DNV, ABS, NK, KR, RINA, CCS

Competition
Separation Dual Passage Structures enables excellent Flame disconnections & improved Cooling effects
Structure Lamellar structures enables excellent Block, Stability and Safety Excellent durability to explosive pressure
Resistance The protrusion of the Lamellar is inserted at the groove of the Seat to stop any movement even during explosion
Standard Inner and outer lamella design applied for all ranges of Crankcase Relief Valves products
Strength Strengthening the Disc stiffness and the Disc structure enabled Open Pressure to maintain even after a secondary explosion

Model Outflow
Area(㎠)		 ØD1(mm) ØD2(mm) ØD(mm) h(mm) H(mm) D(mm) Mounting
Bolt		 P.C.D.(mm) Approx.
weight(kg)
HWG-735 3904 969 705 1008 288 318 425 12-M16 795 245
HWG-645 2990 871 617 910 250 280 378 12-M16 700 190
HWG-565 2299 784 541 823 222.5 252.5 335 12-M16 615 153
HWG-480 1662 699 460 738 187 215 287 8-M16 530 117
HWG-420 1257 636(605) 400 678 167 191 251 8-M16 465 93
HWG-345 830 556 325 595 147 164 214 6-M16 390 72
HWG-320 731 510(605) 305 547 137 154 197.5 6-M12 355 59
HWG-266 499 418 252 435 101.3 109.9 170 6-M12 302 26
HWG-224 346 371 210 392 89.3 96.6 142 6-M12 255 22
HWG-204 284 351 190 367 79.3 86.6 132.5 6-M12 235 20
HWG-173 201 319 160 335 70.8 77.8 - 6-M10 203 14
HWG-162 177 306 150 322 64.3 71.3 - 6-M10 190.5 13
HWG-122 95 262 110 278 55.3 62.6 - 6-M8 150 9
HWG-098 59 237 87 250 44.3 51.6 - 4-M8 122 7

Eye bolts from HWG-345
(H) Means Hinged type explosion relief valve