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HON 303 MK5

HON 303 MK5 is a safety shut-off valve that may be used as a protection system for gas supplies and networks.​​​

HON 303 MK5
Honeywell safety devices/Safety Shut-Off Valves

Features include:

-To be installed on the inlet pressure side with an external measuring line leading to the outlet pressure side in order to ensure automatic closing of the station in the event of overpressure
-Operates with high accuracy and reliability
-Push button for pressure compensating valve
-Re-engage by hand
-Low-pressure loss; fully-automatic operation; no external power supply required
-Suitable for natural, non-aggressive and manufactured gases; nitrogen, carbon dioxide and propane; and other gases upon enquiry
-CE registration according to PED
-Max. inlet pressure pmax: up to 7 bar
Setting range
-Series 303LP: 0.037 to 0.48 bar
-Series 303MP: 0.42 to 4.5 bar
-Pipe sizes: DN 250, DN 300
-Temperature range: 20 to 60 °C

All mechanical components of this device are without potential ignition sources and/ or hot faces. They are not subject to ATEX 95 (94/9/EC). All electronic accessories, on the other hand, meet ATEX requirements.


Honeywell announced it has completed its acquisition of the Elster division of Melrose Industries plc, a leading provider of thermal gas solutions for commercial, industrial, and residential heating systems and gas, water, and electricity meters, including smart meters and software and data analytics solutions. Elster also manufactures gas metering and pressure control devices, as well as total solutions for the gas transmission and distribution industry. After the acquisition, Honeywell secured it's position as world's leading company in providing solutions and products in oil & gas industry. According to Fortune ranking, it is one of the 100 largest companies in the world. Immense portfolio, high quality products and competative prices highlight Honeywell above it's competition.

Honeywell Process Solutions (HPS) is a global leader with over 40 years of experience delivering process automation and control solutions that help industrial customers run their operations safely, reliably, efficiently and sustainably through innovative technologies, services and domain expertise. With more than 12,000 employees around the world, HPS serves customers in more than 125 countries in the oil & gas, refining, petrochemicals, pulp & paper, specialty chemicals, pharmaceuticals, industrial power, and mining & minerals industries.

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