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PVV200 Series

The PVV204 series vents are designed for use on tank trucks which load or discharge with fill caps closed and incorporates roll-over protection.

The PVV204s prevent the build up of pressure and vacuum caused by expansion, contraction and tanker movement.

The PVV204 is designed primarily for thermal relief. The vent incorporates rollover protection by locking shut at any angle greater than 60º from the vertical. 

The vent may also be used on storage and blending tanks. It is important that the pressure/vacuum capability of the tank is known. Different settings may be required.

Features & Benefits
  • Allow excess pressure and vacuum to be equalised through a gauzed flame proof opening.
  • Aluminium body and poppets (S/S also available).
  • All models have roll-over protection ensuring compartment is sealed if tilted more than 60° from vertical.
  • The vent is normally mounted directly to the manhole on the underside of the emergency vent or on a separate weld flange.
  • PVV vents for chemical and stainless steel tanks available.
Technical Information

Materials
-Aluminium body & poppets.
-Stainless steel housing, shafts and springs.
-Bonded nitrile seals.
-Nylon coated bronze ball.

Mounting
May be on a Liquip Manhole cover or on a separate weld flange.

PVV204 (settings comply with AS2809).

  • Pressure Setting 10 to 17 kPa.
  • Vacuum Setting 0 to -4 kPa.
  • Capacity 240m3/hr free air at 35 kPa.
  • Max recommended liquid loading rate 1,000 LPM.
  • Free air bleed hole in body.

PVV204U (settings comply with international codes).

  • Pressure Setting 8 to 12 kPa.
  • Vacuum Setting -0.4 to -2.5 kPa.
  • Capacity 240m3/hr free air at 35 kPa.
  • Max recommended liquid loading rate 1,000 LPM.
  • No bleed hole.
Ordering Information

PVV204: Aluminium Pressure & Vacuum Vent with Nitrile seals (complies to AS2809).

PVV204U: Aluminium Pressure & Vacuum Vent with Nitrile seals (complies to UK & USA codes).

PVV204-ST316: 316 Stainless Steel Pressure & Vacuum Vent with Teflon seals (for S/S tanks).

PVV204-ST316B: 316 Stainless Steel Pressure & Vacuum Vent with Teflon seals, Bleed hole blanked (for S/S tanks).

PVV204-AT: Aluminium Pressure & Vacuum Vent with Teflon seals (for chemical use).

VRB-1: Aluminium weld flange.

PVV200-11M: Steel weld flange

PVV200-11S316: Stainless Steel weld flange.

Associated Equipment

VOH400 series Hatch.

VOH700 series Hatches.

SH300 series swing back Hatches.

Resources
 

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