Established in 1993, Guanfa Valve Manufacture Co., Ltd. is specialized China watts valve manufacturer and distributor of valves, hoses, tubes and pipes. Our oem watts valves are suitable for acid, alkali, water, steam, seawater, coal gas and natural gas. They are widely used in petroleum, chemical, paper making, fertilizer, brewing and metallurgy. The use of specialized software of Pro/E and CAD has shorted the P&D and trial manufacture cycle, and greatly improved the service life and dependability of products. Our high-quality products have been exported to the North Amercia, UK, USA, Germany, Italy, India, France, Australia, Japan.

Seat located above drain; water can't be trapped and sediment can't foul seat
Non-Mechanical seat-to-dic alignment will not stick or freeze. Water seal of high temperature resisting material isolates spring working parts from water during relief
Raised seat; Bronze Body Construction. 3/4". Series 174A Boiler Pressure Relief Valves are used in hot water heating and domestic supply boiler applications to protect against excessive pressures on all types of hot water heating supply boiler equipment. It consists of a bronze body construction with NPT threaded female inlet and NPT threaded female outlet (drain) connections, non-metallic disc-to-metal seating, stainless steel spring, and test lever. Series 174A resists corrosive water conditions, sticking and freezing, and prevents water and sediment from being trapped in the seat. It is designed for emergency safety relief and shall not be used as an operating control. Standard Pressure Setting: 30psi (206.9 kPa), Pressure Range: In 5psi (34.5 kPa) increments from 30 to 150psi (2 to 10 bar) with corresponding high ratings from 650,000 to 14,370,000 BTU/hr.

Description Watts Water Pressure Reducing Valve Series 25AUB-HP-Z3 1-1/4" (0079043) Watts Water Pressure Reducing Valve Series 25AUB, Water Pressure Reducing Valves Sizes: 1 /2" to 2" (15 to 50 mm) With integral strainer Series 25AUB water pressure reducing valves are suitable for initial water pressures up to 300 psi (21.09 bar) and can be adjusted from 25 to 75 psi (172 to 517 kPa) delivery pressure to the system. The standard setting is 50 psi (345 kPa). They are standardly furnished with a bronze body, union threaded female inlet and female threaded outlet connection, stainless steel seat and strainer. All parts are easily and quickly serviceable without removing the valve from the line. The built-in by-pass prevents buildup of excessive system pressure caused by thermal expansion. A water saving test program concluded that reducing the supply pressure from 80 to 50 psi (551 - 346 kPa) resulted in a water saving of 30%. Z-3 = Corrosion resistant adjusting and cage screws for waterworks pit installations H-P= High pressure range 75-125psi

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