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As a result, it offers the highest BTU rating in the industry as well as the ability to deal with varying gas inlet pressures – without a reduction in burner performance and operation. Installation is also made easier with end connectors that eliminate the need for piping unions and a ventless compatible monoblock design. Moreover, this does away with the need for additional vent piping, but also limits greenhouse gas and vent emissions.

This Series 158 is a gas valve range available in sizes from 3/4 inch NPT to 3 inch NPT (DN 10 to DN 80) in both single and monoblock constructions. These Asco 158 valves work in conjunction with the Asco 159 Actuator. The Asco Series 159 Motorized Actuator has a rugged construction, can mount in any position, and offers a visual indication of opening. This new safety shutoff valve is rated for an ambient temperature range of -40°F to 150°F (-40°C to 66°C).

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This video demonstrates the integral steps for installing Swagelok tube fittings, which have earned a global reputation for consistency, quality, and reliability.

8158A120X1X0000 3″ NPT, Safety Shut-off Valve Body 8158A220X1X0000 3″ NPT, Safety Shut-off Valve Body, with Proof of Closure

Installed on impulse lines ahead of monitoring stations in natural gas pipelines, dielectric fittings interrupt cathodic current while permitting full flow. Molded thermoplastic insulation with excellent electrical, chemical, and ultraviolet resistance and low water absorption maintains dielectric strength and integrity over a wide range of operating and climatic conditions. Gaugeable Swagelok tube fitting or tapered pipe thread end connections (NPT/BSP) provide direct connection to tubing or piping systems.

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8158A113X1X0000 1-1/4″ NPT, Safety Shut-off Valve Body 8158A213X1X0000 1-1/4″ NPT, Safety Shut-off Valve Body, with Proof of Closure

The 158 and 159 Asco Series meet up-to-date National Fire Protection Association (NFPA), UL, and Canadian Standards Association (CSA). In addition, these components have earned FM Global standards, Restriction of Hazardous Substances (RoHs) and European Standards (EN) approvals.

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Swagelok tube fittings are designed to meet your highest expectations for safety and dependability, featuring proven design, precise manufacturing, and superior raw materials.

8158A112X1X0000 1″ NPT, Safety Shut-off Valve Body 8158A212X1X0000 1″ NPT, Safety Shut-off Valve Body, with Proof of Closure

Even the most seasoned professionals can experience difficulty identifying threads. Swagelok product manager Andy Hitchcock explains how to identify thread size and pitch on your fittings using a caliper, pitch gauge and thread identification guide.

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* If you cannot find the model number you need, simply contact us and we can order the specific Asco Series 158 model number for you.

Some of the applications include: Boilers/Burners, Ovens/Furnaces/Kilns, Thermal Oxidizers/Incinerators, HVAC Equipment and Gas Generators.

For medium-pressure applications in oil and gas topside assets, learn how compression fittings can offer installation speed and performance benefits over traditional cone and thread connections.

Emerson introduces the Asco Series 158 Gas Safety Shut-off Valves. It works together with the Asco Series 159 Motorized Actuator. They are specifically for burner-boiler applications. They give a new combustion safety shutoff valve option that increases safety and reliability and enhances both flow and control.

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Gaugeable Swagelok tube fitting or tapered pipe thread end connections (NPT/BSP) provide direct connection to tubing or piping systems.

The new valve offers a higher close-off pressure of 75 psi (5.2 Bar). This ensures a safe shutoff in the event of a fuel train system failure. Moreover, it eliminates the need for additional safety components. The valve offers a flow rate which is twice that of other combustion valves on the market.

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Features: Metal components are machined from 316 stainless steel for use in rugged environments; Molded thermoplastic insulation with excellent electrical, chemical, and ultraviolet resistance and low water absorption maintains dielectric strength and integrity over a wide range of operating and climatic conditions; Gaugeable Swagelok® tube fitting or tapered pipe thread end connections (NPT/BSP) provide direct connection to tubing or piping system.

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8158A136X1X0000 2″ NPT, High FLow, Safety Shut-off Valve Body 8158A236X1X0000 2″ NPT, High FLow, Safety Shut-off Valve Body, with Proof of Closure

Isolate and protect monitoring instruments from the effects of electrical current while still permitting full fluid flow with Swagelok® dielectric fittings.

Dielectric fittings and adapters protect the accuracy of monitoring instruments by isolating the instruments from the effects of electrical currents while permitting full fluid flow.

Locate detailed product information, including materials of construction, pressure and temperature ratings, options, and accessories.

Learn how Swagelok Shanghai has helped Shenyang Blower Works Group Corporation achieve consistency, reliability, and cost savings for its customers while improving its own safety and production efficiency.

Installed on impulse lines ahead of monitoring stations in natural gas pipelines, dielectric fittings interrupt cathodic current while permitting full flow. Molded thermoplastic insulation with excellent electrical, chemical, and ultraviolet resistance and low water absorption maintains dielectric strength and integrity over a wide range of operating and climatic conditions.

8158A111X1X0000 3/4″ NPT, Safety Shut-off Valve Body 8158A211X1X0000 3/4″ NPT, Safety Shut-off Valve Body, with Proof of Closure

8158A114X1X0000 1-1/2″ NPT, Safety Shut-off Valve Body 8158A214X1X0000 1-1/2″ NPT, Safety Shut-off Valve Body, with Proof of Closure