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DF-ISO Stainless Steel PV Valve
PV Valves
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DF-ISO Stainless Steel PV Valve:
China DF-ISO Stainless Steel PV Valve:

PV valve is the abbreviation of High Velocity Pressure Vacuum Valve, generally used in the relief system of the oil tanker and chemical tanker, according to the current regulations IMO and IBC.

When the pressure in the tank reaches the set pressure of relief valve, the gas in the tank will be released with the speed of over 30m/s. The vacuum will beformed while the cargo oil tank is unloading, when the vacuum pressure reaches the set pressure of vacuum valve (normally it is -3.5Kpa), the vacuum valve will open automatically,then the air will go into the tank through the flame screen.

Technical Specification:

1. Design Standard: ISO 15364-2007, MSC/circ. 677, GB/T19699-2012, MSC.1/circ. 1324, MSC/circ. 1009

2. Flange Standard: GB2506, JIS B2220, ANSI, DIN

3. Design Pressure:

Opening Pressure of Pressure valve: 14Kpa for Oil cargo tank, 20Kpa fo chemical cargo tank.

Opening pressure of Vacuum Valve: -3.5Kpa.

4. Material: SUS304, SUS316L


CCS, BV, ABS Type Approval Certificate and Product Certificate, NK product certificate

Main Parts and Material:
Serial No. Parts Quantity Material
1 P-valve base 1 Stainless Steel
2 Water nozzle 1 Stainless Steel
3 P-valve seat 1 Stainless Steel
4 P-valve disc 1 Stainless Steel
5 Matching block 1 Stainless Steel
6 P-valve body (A) (B) 1 Stainless Steel
7 Conducting machine 1 Stainless Steel
8 Handle 1 Stainless Steel
9 V-valve body 1 Stainless Steel
10 Matching block 1 Stainless Steel
11 V-valve disc 1 Stainless Steel
12 V-valve seat 1 Stainless Steel
13 Flame screen 2 Stainless Steel
14 Flame screen gland 1 Stainless Steel
15 Nameplate 1 Stainless Steel
16 Climbing pole 1 Stainless Steel
17 Gas-freeing cover or V-valve cover 1 Stainless Steel
Technical Parameters:
Type Desinged Opening Pressure(Kpa) Rated Working Pressure (Kpa) Hydraulic Test Press (Mpa) Velocity (m/s) Rated Flow Rate(m3/h)
Pressure Valve Vacuum Valve Pressure Valve Vacuum Valve Pressure Valve Vacuum Valve
DF50 14~20 -3.5 21 -7 0.345 ≥30 300 300
DF65 400 400
DF80 600 500
DF100 800 600
DF125 1000 800
DF150 2500 2200
DF200 3000 3000
DF250 3500 3000

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