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Stainless Steel Pressure/Vacuum valve

  • DEYUAN

  • Standard

  • Pressure Reducing

  • Low Pressure

  • Pneumatic

  • Casting, Cast Steel, Stainless Steel

  • Normal Temperature

  • liquid

  • 50-250

  • China (Mainland)

  • DF

  • OEM

  • one year

  • GB, JIS, DIN, ANSI, BS

  • CCS, BV, ABS,

  • each piece with plastic bag, and the outside case is the plywood case.

  • 10-60days according to the quantity

 

Stainless Steel Pressure/Vacuum valve:

 

Marine Pressure/Vacuum Valve for cargo oil tank (or P/V valve,forshort) is also called as high-velocity relief valve, high velocity P/V valve, generally used in the relief system of the oil tanker and chemical tanker, according to the current regulations IMO and IBC.The purpose of the high velocity valve is to provide automatic control of pressure differentials during liquid cargo ship loading, voyage,ballasting and de-ballasting without any manual operation, also, it provides auto-protection against fire and explosions on deck. Additionally in the event that the inert gas system can not supply gas promptly, the vacuum valve can auto open to protect the tank against excessive vacuum when de-ballasting on dock. Normal, when the pressure risen in tank because of temperature or loading, the pressure valve open automatically and vent gas. When the pressure of tank come to pressure differentials, the vacuum valve or pressure valve all can be automatic resetted. If an ignition occurs outside the tank space, the flames will be quenched in the flame trap. 

 

 

Specification: 

Material: Cast Steel or Stainless Steel

 

Flange Standard: GB, JIS, DIN, ANSI, BS

 

Opening Pressure of Vacuum Valve: -3.5kPa

 

Opening Pressure of Pressure Valve on the oil tank is 14kPa, on the chemical tank is 20kPa.

 

The opening pressure of the pressure may be different, but the differences of opening pressure and flow range is inapparent if the pressure valves have the same diameter.

 

* When the liquid cargo ships need to load the goods of the propylene oxide class, with the stainless steel high-velocity relief valve. The valve manufacturing materials for 304, 304L, 316L quality stainless steel, pressure valve opening pressure is generally set at 60KPa vacuum valve.

 

 

 

Main Parts & Material:

 

Serial No. Parts Quantity Material Remarks
1 P-valve base 1 Stainless Steel Stainless Steel
2 Water nozzle 1 Stainless Steel Stainless Steel
3 P-valve seat 1 Stainless Steel Stainless Steel
4 P-valve disc 1 Stainless Steel Stainless Steel
5 Matching block 1 Stainless Steel Stainless Steel
6 P-valve body (A) (B) 1 Stainless Steel Stainless Steel
7 Conducting machine 1 Stainless Steel Stainless Steel
8 Handle 1 Stainless Steel Stainless Steel
9 V-valve body 1 Stainless Steel Stainless Steel
10 Matching block 1 Stainless Steel Stainless Steel
11 V-valve disc 1 Stainless Steel Stainless Steel
12 V-valve seat 1 Stainless Steel Stainless Steel
13 Flame screen 2 Stainless Steel Stainless Steel
14 Flame screen gland 1 Stainless Steel Stainless Steel
15 Nameplate 1 Stainless Steel Stainless Steel
16 Climbing pole 1 Stainless Steel Stainless Steel
17 Gas-freeing cover or V-valve cover 1 Stainless Steel Stainless Steel

 

 

 

Main Size List(mm):

DN D2 D1 D L H Assembly hole
250 320 350 395 460 860 12xø22
200 268 295 340 455 850 8xø18
150 202 225 265 385 710 8xø18
125 178 200 240 380 665 8xø18
100 148 170 210 285 565 4xø18
80 128 150 190 285 535 4xø18
65 110 130 160 255 485 4xø14
50 90 110 140 255 485 4xø14

 

*The flange size in the list as per GB2501.

 

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