Emerson Introduces New Gas Valve to Enhance Safety and Reliability of Combustion Systems

February 10, 2020 by Alessandro Mascellino

Emerson recently announced the ASCO Series 158 Gas Valve and series 159 motorized actuator.

The new products are particularly designed for fuel train applications and HVAC building utilities, as they come with a new combustion safety shutoff valve option aiming at increasing reliability and control.

The ASCO Series 158 Gas Valve and Series 159 Motorized Actuator is a new version of ASCO Series V710 (motorized safety shut-off valve), Series AH2E (on-off motorized actuator) and Series AH4E (high-low-off motorized actuator) product lines.

Focusing on maximizing safety, the new valve features a close-off pressure of 75 psi (5.2 Bar), thus securing a safe shutoff in cases of fuel train system failure.

The valve is therefore rated for an ambient temperature range between -40°F and 150°F (-40°C to 66°C) and comes with an optional watertight National Electrical Manufacturers Association (NEMA)-approved Type 4 enclosure.

The ASCO Series 158 gas valve is available in range sizes from ¾” NPT to 3” NPT (DN 10 to DN 80) in the monoblock and single constructions.


ASCO series Emerson gas valve

The ASCO Series 158 Gas Valve and Series 159 Motorized Actuator. Image used courtesy of Emerson. 


Optimized for Extreme Conditions

According to Emerson, the new product’s flow rate would be twice that of other combustion valves on the market. Additionally offering the highest BTU (British thermal unit) rating in the industry, allowing the valve to deal with varying gas inlet pressures while maintaining optimal performance.

As far as the actuator is concerned, the new ASCO Series 159 is built with a rugged exterior, it can be mounted in any position and provides a visual indication of opening.

Both Series 158 and Series 159 satisfy National Fire Protection Association (NFPA) standards, UL standards, Canadian Standards Association (CSA) and FM Global standards.

They have also received Restriction of Hazardous Substances (RoHS) and European Standards (EN) approval. Table describing the ASCO Series 158/159 features. Image used courtesy of Emerson Electric. 


High-level Safety and Easy Installation

Because of its high close-off pressure capabilities, the ASCO Series 158 gas valve does not require any additional safety components, providing engineers with a more compact solution.

“We’re offering our customers a highly adaptable safety shutoff valve that offers the same high levels of safety and reliability they have come to associate with the ASCO combustion valve products,” Erik VanLaningham, vice president of marketing for industrial automation at Emerson said in a blog post.

VanLaningham highlighted how the company aims to provide easy-to-use, globally applicable combustion control solutions, which at the same time provide engineers with the flexibility to address a full range of commercial and industrial applications.

“Because we know our customers are often working with tight deadlines,” he explained, “we’ve made sure these products are available on short lead times.”


Structurally Designed for Easy Installation Process

The installation of these products is also easier than traditional gas valves, as they come with end connectors that eliminate the need for piping unions, as well as the monoblock mentioned above design that is also ventless-compatible. This structural design choice both erases the need for additional vent piping and limits greenhouse gas and vent emissions.

“With the launch of the new ASCO Series 158 and Series 159, customers will now be able to purchase a complete global combustion system from one supplier,” VanLaningham said.

According to him, this will allow the new products to achieve a new level of efficiency and performance.

“The Emerson combustion solution delivers flexible, safe and globally approved products and systems, enabling easy installation and integration with their other systems and components,” he concluded.


How do you use valves like these? Let us know in the comments.