Tri-State Valve & Instrument Co.
Specialist pressure relief valves control valve suppliers. Regulators. Valve automation. Factory authorized ASME assembler for 'Farris Engineering' and 'Spence' brands.
http://www.tvimem.com/

TankTech
Manufactures venting devices for tanks. Breather valve, flame arrester, pressure/vacuum relief valve, others
http://www.tanktech.co.kr

ARCA Valve Group
Manufactures single and double seated diaphragm and butterfly valves, actuators and positioners.
http://www.arca-valve.com

RR Valve, Inc.
RR Valve, Inc., is a high tech manufacturer of reset relief valves for the oil field industry. Based in Houston, Texas.
http://www.rrvalve.com

Lung Yun Casting Co., Ltd.
Lung Yun Casting Co., Ltd. V A Ball Valves,Gate Valves,Globe Valves,Check Valves ,Sanitary Fittings,Flanges,Casting Parts,Trailer Parts,Pipe Fittings Manufacturers and Suppliers from Taiwan, China and Worldwide.
http://www.lungyun.com.tw/

Zhejiang Jiehua Valve Co., Ltd.
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http://www.jie-hua.com

Singer Valve, Inc.
Offers small to large sized pilot-operated, diaphragm-actuated, automatic control valves for industrial usage.
http://www.singervalve.com

Scientific Linings and Coatings, Inc.
'Yellow Jacket' weather caps for pressure relief valve protection.
http://www.weathercap.com

Mercer Valve Company, Inc.
Manufactures conventional and pilot-operated safety pressure relief valves.
http://www.mercervalvecompanyinc.com/

Portersville Valve Company
Manufactures and supplies safety, line, relief and control valves and actuators.
http://www.portersvillevalve.com