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.

B911s m3replacement

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

Watts B911 installation Instructions

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.

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

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

WattsM3174A

B911s m3manual

* 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.

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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

watts b911t-m3

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

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.

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.

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

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

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).