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Explosion Proof Wave Safety Pressure Reducing Valves For Avoid Water Hammer

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Explosion Proof Wave Safety Pressure Reducing Valves For Avoid Water Hammer

Explosion Proof  Wave Safety Pressure Reducing Valves For Avoid Water Hammer
Explosion Proof  Wave Safety Pressure Reducing Valves For Avoid Water Hammer Explosion Proof  Wave Safety Pressure Reducing Valves For Avoid Water Hammer

Large Image :  Explosion Proof Wave Safety Pressure Reducing Valves For Avoid Water Hammer

Product Details:
Place of Origin: Shanghai , China
Brand Name: OEM
Certification: ISO 9001
Model Number: FA49H
Payment & Shipping Terms:
Minimum Order Quantity: 1pcs
Price: negotiation
Packaging Details: Usually packing by plywood case suit for sea delivery
Delivery Time: 1usually within 35 days after received your payment
Payment Terms: T/T advance or L/C at sight
Supply Ability: 90,000pcs per month
Detailed Product Description
Product Name: Explosion-Proof Wave Valve Application: Water, Oil, Gas Etc.,
Size: DN40 ~DN200 Pressure: PN16~PN40
Standard: DIN / BS / AWWA / JIS Body: Carbon Steel / Stainless Steel
Trim: Stainless Steel / F6 Steillie
High Light:

pressure sustaining valve


pump control valve

Explosion-Proof Wave Safety Valve (FA49H) For Avoid Water Hammer


Explosion Proof  Wave Safety Pressure Reducing Valves For Avoid Water Hammer 0




The explosion-proof wave safety valve can eliminate the water shock & prevent water hammer.

Installed in the beginning of the pipeline to prevent water hammer and protect the equipment.


The explosion proof valve is a safety valve which can eliminate the shock wave and can block

the water hammer shock wave, and the product is composed of a plurality of groups of safety

valves, and the function of the safety valve can not be achieved.


The exit of the product is installed in the water supply pipe and the head of civil air defense to

transport medium, to block wave and wave combination, to prevent internal shock wave into the

system engineering facilities, so as to eliminate the destructive shock wave, to protect the system

facilities normal operation and safety protection purpose.


Under normal conditions the valve is normally open, medium normal flow, when the shock wave into

the valve, the main valve valve to overcome the impact of spring strength, rapid closure of the shock

wave in the outer end, just enter the shock wave in the wave valve under the action of the wave

chamber, resolve the destructive force of shock wave, through the barrier and resolve to achieve the significance of protection.


Main parts material
Body, bonnet: carbon steel/ Stainless steel
Spring: stainless steel


Installation instructions
All kinds of FA49H explosion-proof safety valve should be installed vertically.
FA49H type explosion-proof wave safety valve outlet should be no resistance, to avoid pressure phenomenon.
FA49H type explosion proof safety valve should be specially tested before installation, and check its sealing performance.
The safety valve of wave FA49H explosion-proof in use should be regularly checked.



Explosion Proof  Wave Safety Pressure Reducing Valves For Avoid Water Hammer 1





A27H type are used for the equipment and pipeline of water, air, steam etc. medium what the working temperature are less than 200 . A27Y type are used for the equipment and pipeline of the quality with corrode me-dium what the working tempe-rature are less than 200 . Take for extra pressure devices.    
Explanation of materials for main parts    
NO. Name of part A27H Materials A27W-P Materials A27W-R Materials    
1 Body HT350 ZG1Cr18Ni9Ti ZG1Cr18Ni12Mo2Ti    
2 Nozzle 35 ZG1Cr18Ni9Ti ZG1Cr18Ni12Mo2Ti    
3 Adjusting ring 2Cr13 1Cr18Ni9Ti 1Cr18Ni12Mo2Ti    
4 Disc 2Cr13 1Cr18Ni9Ti 1Cr18Ni12Mo2Ti    
5 Spring 50CrVA 50CrVA Coated 50CrVA Coated    
6 Stem 2Cr13 2Cr13 1Cr18Ni9Ti    
7 Adjusting bolt 45 2Cr13 1Cr18Ni9Ti    
8 Cap ZG200-400 ZG200-400 1Cr18Ni9Ti    
  Sealing surface of material D507 Depositing D507 Co Depositing stellite    
10 Adjusting nut Q235-A 2Cr13 1Cr18Ni12Mo2Ti    
  Sealing surface of material "Y" Co Depositing stellite, "H" D507 Depositing D507, "W" body    



Dimensions (mm)
Nominal diameter Dimensions (mm)
DN (mm) do Rc L L1 G H
15 10 1/2" 40 65 1/2" 135
20 15 3/4" 45 70 3/4" 140
25 20 1" 45 76 1" 155
32 25 11/ " 55 85 11/ " 170
40 32 11/ " 55 85 11/ " 310
50 40 2" 67 100 2" 322
65 50 21/ " 76 112 21/ " 344
80 65 3" 110 135 3" 395




Capacity : 2000 Nm3/hr
Medium: Feed Gas as per below gas composition

Pipe Size : 4”
Flanged connection ratings 150 # WNRF
Operating pressure : 2 barg
operating temp : 60 deg C
Design temp : 90 deg C
Design pressure : 4 barg
Set Pressure 4 barg
Back pressure : N.A
Relieving Temp : 80 deg C
MOC: Carbon Steel

Sizing for PCV failure

Gas property of Methane


Ø  Body Material: Carbon Steel
Ø  Trim material:  stainless steel
Ø  Inlet rating and connection – 2”X150#
Ø  Outlet rating and connection – 2”X150#
Ø  Orifice area – F
Ø  Operating pressure – 10Kg/cm2
Ø  Set pressure – 15Kg/cm2
Ø  Fluid – LUBE OIL
Ø  Temperature: 45oC




Pressure Relief Valve, Body Material: Carbon Steel,  Trim material:  stainless steel





The valve instantly opens when the pressure in the pipeline exceeds the preset safe level, thus relieving excessive pressure from the pipeline. When the pressure returns to normal, the valve closes slowly, at an adjustable speed. The valves also can be used to sustain upstream pressure to a preset pressure value.


 Explanation of materials for main parts
NO. Name of part A21H-C/A21F  KA21Y-C Materials A21W-P/A21F-P  KA21Y-P Materials A21Y-R    Materials
1    Union 20 1Cr18Ni9Ti 1Cr18Ni12Mo2Ti
2  Union nut 35 2Cr13 1Cr18Ni9Ti
3   Nozzle 35 1Cr18Ni9Ti 1Cr18Ni12Mo2Ti
4   Body 2Cr13 1Cr18Ni9Ti 1Cr18Ni12Mo2Ti
5   Disc 2Cr13/2Cr13+PTFE 1Cr18Ni9Ti/1Cr18nI9Ti+PTFE 1Cr18Ni12Mo2Ti
6    Spring washer 2Cr13 1Cr18Ni9Ti 1Cr18Ni12Mo2Ti
7   Spring 50CrVA 50CrVA Coated  50CrVA Coated 
8  Locking nut Q235-A 2Cr13 1Cr18Ni9Ti
9  Spring guide 2Cr13 1Cr18Ni9Ti 1Cr18Ni12Mo2Ti
10  Adjusting nut Q235-A 2Cr13 1Cr18Ni12Mo2Ti
   Sealing surface of material "Y" Co Depositing stellite, "H" D507 Depositing D507, "W" body


 Dimensions (mm)
Type (DN) do d Do M d1 D1 L L1 H



KA21Y-16C A21H-16C A21H-40 15 12 15 20 M27    1.5 G1/2" 30 35 76 66
A21W-16P A21W-40P KA21Y-16P 20 16 20 25 M33    1.5 G3/4" 34 40 87 68
  25 18 25 31 M39    1.5 G1" 40 50 100 105
A21Y-64 15 10 15 25 M39    1.5 G1" 44 50 100 66
A21Y-64P A21Y-100 20 10 20 31 M39    1.5 G1" 44 50 100 68
A21Y-100P 25 12 25 31 M39    1.5 G1" 44 50 100 105
A21W-160 15 8 20 / M24    2 G1" 44 50 100 261
/160P 20 8 25 / M33    2 G1" 44 50 100 261
  25 8 28 / M36    2 G1" 44 50 100 285





 Explanation of materials for main parts
NO. Name of part A28H Materials A28Y-P Materials A28Y-R8       Materials
1   Body HT200 ZG1Cr18Ni9Ti CF8M
2   Nozzle 35 ZG1Cr18Ni9Ti CF8M
3    Adjusting ring 2Cr13 1Cr18Ni9Ti 316
4   Disc 2Cr13 1Cr18Ni9Ti 316
5   Spring 50CrVA 50CrVA Coated  50CrVA Coated 
6   Stem 2Cr13 2Cr13 316
7  Adjusting bolt 45 2Cr13 316
8    Cap ZG200-400 ZG200-400 CF8M
  Sealing surface of material D507 Co
Depositing D507 Depositing stellite
10  Adjusting nut Q235-A 2Cr13 1Cr18Ni12Mo2Ti
   Sealing surface of material "Y" Co Depositing stellite, "H" D507 Depositing D507, "W" body

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Shanghai kangquan Valve Co. Ltd.

Contact Person: Mr. Steve

Tel: +8613818096733

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