On and off valves for hazardous conditions

15th January 2020
Posted By : Anna Flockett
On and off valves for hazardous conditions

CIRCOR International features high-quality R.G. Laurence on/off control valves for applications demanding rapid opening and sealed closure. ATEX-certified and Factory Mutual-approved R.G. Laurence valves offer reliable performance in high temperature and extreme service conditions.

R.G. Laurence 2500 series two-way globe-type piston valves are operated by an external lever connecting the lifting action of the linear actuator to the valve piston via a rotary shaft. This mechanical advantage sets R.G. Laurence valves apart, as more force can be leveraged when operating the valve. Direct, semi-direct, and pilot operated valve piston options make these valves ideal within light liquids and gases, such as hydrogen, oxygen, helium, and carbon dioxide. The rotary shaft also enables stronger return spring action, ensuring a reliable and fail-safe return.

Because their magnetic plunger and the solenoid are mounted outside and away from the valve body, R.G. Laurence valves can safely handle up to 425°F fluid temperature, including steam, without the coil insulation breakdown often associated with packless type solenoid valves. R.G. Laurence valves deliver unparalleled performance in dirty, viscous, or unclean liquids such as gasoline, fuel gases, lube and fuel oils as well as in all waters, including seawater, and steam. R.G. Laurence valves also operate reliably under the stress of superheated steam and hot gases.

Quick acting R.G. Laurence valves combine performance with safety. The 2500 Series is FM approved for safety shut-off of fuel oils and gases. The electric actuator is also FM-approved as explosion-proof (Class I, Groups B, C, & D, Division 1, and Class II, Groups E, F, & G), and complies with requirements for NEMA 4 watertight enclosures.

Long trusted by power plants as an essential component in turbines, R.G. Laurence valves deliver safe operation and combustion protection to a variety of industries. Because it can be used in a Division 1 hazardous atmosphere, this product line is ideal for oil refineries, gas processing stations, off-shore oil and gas platforms, and facilities specialising in chemical processing and catalytic conversion. CIRCOR has the ability to promptly provide service, parts, and direct replacement units wherever a customer is located around the globe.


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