2 Valves Manifolds

One isolation valve and one vent valve, compact solution for static pressure instrument isolation and safe depressurization

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What Are 2 Valves Manifolds?

A 2 valves manifold combines one isolation valve and one vent valve in a single machined block. It is used to isolate a static pressure instrument, such as a pressure gauge, from the process line, and to safely vent the instrument before removal or maintenance.

The manifold is machined from solid barstock or forged, providing a compact, high-integrity construction that eliminates internal weld points and reduces the number of potential leak paths compared to an equivalent assembly of separate valves and fittings.

Common applications include: pressure gauge isolation, transmitter isolation in static pressure service, and any application requiring safe venting of the instrument side before disconnection.

✓ Integrates isolation and vent in one block, fewer connections, reduced leak risk, faster maintenance

Technical Specifications

Pressure Rating

6,000 PSI | 10,000 PSI

Connection Types

Flanged | Threaded (NPT) | Threaded/Butt-Weld | F/F | M/F | F/M

Connection Size

1/2" NPT-F | 1/4" NPT-F | 3/4" NPT-F | 1" NPT-F | 1/8" NPT-F

Materials

Stainless Steel 316/316L, Duplex, Monel, Hastelloy and other exotic alloys, NACE MR0175/ISO 15156 compliant for sour service

Seal Options

PTFE | Graphite

Mounting

Direct | Remote

Venting

Without vent (MOD. 222, 260, 262) | Single vent 1/4" NPT-F (all others)

Key Features

Isolation and Vent in One Block

Combines one isolation valve and one vent valve in a single machined block, replacing a separate valve and bleed assembly and eliminating the associated connections and potential leak paths.

High-Integrity Construction

Machined from solid barstock to eliminate internal defects and weld points inherent in fabricated assemblies, ensuring pressure boundary integrity under extreme conditions.

Wide Model Range

Available in flanged and threaded versions, with or without swivel adapter, in compact and standard body sizes, and with butt-weld process connection, covering all installation requirements.

Integral Swivel Adapter Option

MOD. 290/291 incorporate an integral swivel adapter, simplifying connection to the instrument and reducing the need for additional fittings at the process side.

Configuration Options

2 Valves Manifolds can be customized to meet your specific requirements:

Bonnet Types

• Standard Screwed
• OS&Y (Outside Screw & Yoke)
• Bolted Bonnet
• Extended (for cryogenic)

Special Features

• With integral swivel adapter (MOD. 290/291)
• Compact body (MOD. 295M)
• Lockable operators
• Anti-tamper design

End Connections

• Flanged
• Threaded (NPT)
• Butt-Weld (MOD. 295 BW-Pipe)
• Custom configurations

Where 2 Valves Manifolds Excel

2 valves manifolds are the ideal choice for:

Pressure gauge isolation from the process line in static pressure service

Safe instrument venting before removal or maintenance, without disturbing the process

Transmitter isolation in single-leg, static pressure measurement applications

Compact installations where a single integrated block replaces separate valve and fitting assemblies

Need a different configuration?

Explore our 3 Valves manifolds for differential pressure instruments, or 4–5 Valves manifolds for the most demanding DP applications.

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