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High Velocity Pressure/Vacuum Valve


  • Standard

  • Pressure Reducing

  • Low Pressure

  • Pneumatic

  • Casting, Cast Steel, Stainless Steel

  • Normal Temperature

  • liquid

  • 50-250

  • China (Mainland)

  • DF

  • OEM

  • vessel

  • one year


  • CCS, BV

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

  • 10-60days according to the quantity


High Velocity P/V Valve:


Product Description



High Velocity Pressure/Vacuum Valve for cargo oil tank (or High Velocity P/V valve, for short) is 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.



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 P/V valve. The valve manufacturing materials for 304, 304L, 316L quality stainless steel, pressure valve opening pressure is generally set at 60KPa vacuum valve.

Packaging & Shipping

Package: plywood case

Shipping: by air or by sea, by courier



Our Services


One-Stop Service: We supply all kinds of marine and offshore products, from securing the order to final delivery, we work hard to make sure everything goes as required and with high standard quality.


High quality: We are here to provide you with safe and reliable goods. Quality is always our main priority, our quality control program make sure that no defect or poor workmanship will be supplied. According to customer's requirement, our quality can meet the rules and standards of International Class Society such as LR, ABS, DNV, GL, BV, NK, KR, RINA, IRS and CCS.


Professional: With more than 7 years of experience in marine and offshore field, our marketing and technical team can assure you that we can understand your requirement well and deal with your inquiry professionally.


Fast Delivery: We cooperate with the reliable logistic partner, including land, air and sea to help us deliver the goods to your hand on time.



Reliable Partner: With 95% clients' satisfactory, we are confident to be your reliable partner.



Company Information

 We are an ISO 9001-2008 Company Certified by DNVGL,  supply all kinds of marine and offshore products for various vessels including VLCC, FSO, FPSO, LNGC, LPGC, Container Ships, Cargo Liners, Bulk Carriers, Oil Tankers and oil platform, from securing the order to final delivery, we work hard to make sure everything goes as required and with high standard quality.



1. All inquiries will be replied within 24hours.

2. The size is necessary when inquiry for PV valve.