HOKE Gauge Valves Distributor and Supplier in India

Priminox Overseas is an official distributor and ISO 9001 and ISO 14001 certified stockist of HOKE gauge valves in Mumbai, India. HOKE gauge valves give high-integrity instrument isolation on pressure gauges and pressure transmitters. We supply the HM68 Series, which covers the HM681 multi-port, HM682 single block and bleed, and HM683 double block and bleed configurations. The HM68 range uses 316/316L dual certified Stainless Steel as standard and reaches 6,000 psi (413 bar) at 212°F (100°C) with PTFE packing.

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Explore the Full Series of HOKE Gauge Valves

The HM68 Series covers three configurations: the HM681 multi-port, HM682 single block and bleed, and HM683 double block and bleed. All three carry a 316/316L dual certified Stainless Steel body as standard, PTFE packing, NACE MR-01-75 compliance, and a Ø 4.76 mm through bore with Cv 0.4 fully open. PTFE packing handles 6,000 psi (413 bar) at 212°F (100°C) and 4,000 psi (275 bar) at 392°F (200°C); GRAFOIL packing extends temperature service to 842°F (450°C) at 3,300 psi (230 bar).

HOKE HM681 Multi-Port Gauge Valve

Configuration: Multi-port head combining isolate, vent, and equalise functions in a single body.
Application: High-integrity isolation of pressure gauges and pressure transmitters.
Standard Inlet: 1/2" NPT (1/4" NPT also available).
Inlet Connection Options: Female, male, male x female NPT; BSPP, integral GYROLOK, or integral metric on request.
Stem Tip: Hard standard, PCTFE soft optional (120°C maximum).
Weight: 1.76 lbs (0.8 kg).
Available Options: 10,000 psi rated (AA), anti-tamper isolate (AD), lockable isolate (AE), BSPP connections (AH), panel nut on bonnet (AP).

HOKE HM682 Single Block and Bleed Gauge Valve

Configuration: One isolate valve with a separate vent for safe instrument removal and in-line calibration checks.
Application: High-integrity isolation of pressure gauges and pressure transmitters.
Standard Inlet/Outlet: 1/2" NPT, with 1/4" NPT vent plug supplied loose.
Inlet Connection Options: Female, male, male x female NPT; BSPP, integral GYROLOK, or integral metric on request.
Stem Tip: Hard standard, PCTFE soft optional (120°C maximum).
Weight: 2.2 lbs (1.0 kg).
Available Options: 10,000 psi rated (AA), anti-tamper isolate (AD), lockable isolate (AE), anti-tamper vent (AB), lockable vent (AC), BSPP connections (AH).

HOKE HM683 Double Block and Bleed Gauge Valve

Configuration: Two isolated valves in series with a vent between them, giving positive double block and bleed in one body.
Application: High integrity isolation of pressure gauges and pressure transmitters where double block is specified for safety or regulatory reasons.
Standard Inlet/Outlet: 1/2" NPT, with 1/4" NPT vent plug supplied loose.
Inlet Connection Options: Female, male, male x female NPT; BSPP, integral GYROLOK, or integral metric on request.
Stem Tip: Hard standard, PCTFE soft optional (120°C maximum).
Weight: 2.86 lbs (1.3 kg).
Available Options: 10,000 psi rated (AA), anti-tamper isolate (AD), lockable isolate (AE), anti-tamper vent (AB), lockable vent (AC), BSPP connections (AH).

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Industries We Supply HOKE Gauge Valves

HOKE gauge valves carry out high-integrity pressure gauge and transmitter isolation duty across the following industries:

Oil and Gas

Petrochemicals

Refining

Chemical Processing

Power Generation

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HOKE Catalogue

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HOKE Gauge Valves: Sourcing and Technical Questions

The difference is in the valve configuration. The HM681 is a multi-port valve with isolate, vent, and equalise functions in one body. The HM682 is a single block and bleed with one isolate plus a vent. The HM683 is a double block and bleed with two isolates in series and a vent between them.

The maximum pressure of HOKE Gauge Valves is 6,000 psi (413 bar) at 212°F (100°C) with both PTFE and GRAFOIL packing. PTFE holds 4,000 psi (275 bar) at 392°F (200°C); GRAFOIL extends to 3,300 psi (230 bar) at 842°F (450°C). A 10,000 psi-rated option (designator AA) is available on request.

The standard body material on the HM68 Series is 316/316L dual-certified Stainless Steel. Optional alloys include HASTELLOY C276, MONEL, Super Duplex, Duplex, Titanium, Titanium Blue Anodised, 625 Inconel, 825 Inconel, 6%Mo, and Carbon Steel. All special materials are sourced from NORSOK M-650-approved mills.

The HM68 Series supports inlet sizes of 1/4" NPT and 1/2" NPT in female, male, or male x female arrangement. BSPP, integral GYROLOK, and integral metric connections are available on request.

Yes, body and trim parts on all 316/316L HM68 gauge valves comply with NACE MR-01-75 as standard. Mill certificates to EN 10204-3.1 are issued with the order.

Explore Other HOKE Products from Priminox Overseas

Beyond instrumentation valves, Priminox stocks the complete HOKE product family — fittings, actuators, quick couplings and sampling solutions.

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