TQF Cast Steel PV Valve:
China TQF Cast Steel PV Valve:
PV Valve is the abbreviation of High Velocity Pressure Vacuum Relief Valve which is installed on the liquid cargo ship and provides automatic control of pressure difference during loading, voyage, ballasting and de-ballasting without manual operation. Furthermore, the high velocity valve provides active protection against fire and explosion on the deck.
The pressure or vacuum generated in the cargo tank is over the setting pressure, the pressure valve will exhaust automatically and the vacuum valve will inhale until the pressure difference between the outside and the inside of tank restores to the preset level.When the suction valve works, if the ignition occurs outisde the tank space, the flames will be quenched in the flame trap. When the vent valve works, if the ignition occurs outside the tank space, the flames will be quenched by the high velocity airflow from the vent valve.
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
3. Design Pressure:
Opening Pressure of Pressure valve: 14Kpa for Oil cargo tank, 21Kpa fo chemical cargo tank.
Opening pressure of Vacuum Valve: -3.5Kpa.
Certificate:
CCS, BV Type Approval Certificate and Product Certificate
Main Parts and Material:
Body: Cast Steel (20#), Nodular Iron, Stainless Steel (304, 316L)
Stem: Stainless Steel (316L)
Flame Screen: Stainless Steel (316L)
Disc: Stainless Steel (316L)
Specifications:
| Type | Desinged Opening Pressure（Kpa) | Rated Working Pressure (Kpa) | Velocity (m/s) | Flow Rate(m3/h) | |||
| Pressure Valve | Vacuum Valve | Pressure Valve | Vacuum Valve | Pressure Valve | Vacuum Valve | ||
| TQF-50 | 14±10% | -3.5±20% | ~21 | -7 | ≥30 | 800 | 400 |
| TQF-80 | 1000 | 700 | |||||
| TQF-100 | 1200 | 800 | |||||
| TQF-125 | 1600 | 1300 | |||||
| TQF-150 | 2000 | 1300 | |||||
| TQF-200 | 2300 | 2500 | |||||
