Parker’’s single port gauge valves with vent are purpose designed valves for operation with any fluid up to 6,000 psi (414 bar) rating.

Parker’s HVG series single-port gauge valves are rated at 6,000 PSI (414 bar) and provide a single 1/4″ NPT port for the optional fitting of a captive bleed/vent valve or blanking plug.

All HVG series gauge valves have a self centering, non-rotating spindle tip to ensure 100% bubble-tight shut-off and offer a choice of tip materials as well as PCTFE or PEEK seating alternatives to metal-to-metal, for gas applications.

As standard, the valves feature PTFE gland packing. Fire-safe graphite packing to meet BS 6755 Part 2 and API 607 is available as an option.

The spindle is equipped with a backstop for blowout prevention and the gland is externally adjustable.

Parker’s gauge valves are manufactured from 316 stainless steel as standard, NACE compliant and other types of materials are also available.


    • Markets:
    • • Oil and Gas Offshore
    • • Oil and Gas Onshore
    • • Petrochemical
    • • Chemical
    • • Power Generation


    • Features/Benefits:
    • Temperature range of -54 to 538˚C (-65 to 1000˚F)
    • • NACE compliant
    • • 100% repeatable bubble-tight shut-off
    • • Heat code traceable
    • • Oxygen clean


    • Applications:
    • • Process to instrument interface
    • • Pressure & Flow measurement
    • • Lubrication skids
    • • Water Treatment
    • • Chemical injection skids
    • • Hydraulic systems for wellhead control
    • • Emergency shut down
    • • Pumping packages
    • • Gas booster systems
    • • Test equipment


Performance Characteristics

Inlet Size (inch)

1/4 NPT, 3/8 NPT, 1/2 NPT

Inlet Connection

Female, Male

Outlet Size (inch)

1/4 NPT, 3/8 NPT, 1/2 NPT

Outlet Connection



Stainless Steel, Monel, Duplex, Super Duplex, Hasteloy, Carbon Steel, 6Mo, Titanium, Incoloy 825, Incoloy 625

Flow Factor 1 (Cv)

0.35 standard

Maximum Working Pressure (psi)

6,000 (5,000 for Monel)

Maximum Working Pressure (bar)

414 (345 for Monel)

Minimum Working Temperature (C)


Maximum Working Temperature (C)


Minimum Working Temperature (F)


Maximum Working Temperature (F)


Seat Material

Metal/metal seated

Packing Material

PTFE as standard, graphite optional

Valve Option

To order individual bleed valves and plugs contact factory