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NAFCO | The Difference Between Brass Gate Valve and Brass Globe Valve

The Difference Between Brass Gate Valve and Brass Globe Valve Time:2019-01-02 From: NAFCO | Brass Valves Manufacturer China Brass gate valve and Brass globe valve are the two most commonly used shut-off valves. The main differences are: 1, the sealing surface is different When the Brass gate valve is opened and closed, the sealing surface of the valve core and the valve seat always contact and rub against each other, so the sealing surface is easy to wear, especially when the valve is close to the closed state, the pressure difference between the front and the rear of the valve core is large, and the sealing surface wear is more serious. When the valve flap of the shut-off valve is in the open state, its valve seat and the valve sealing surface are no longer in contact, so its sealing surface is less mechanically worn, but if the medium contains solid particles, it is easy to damage the sealing surface. . The sealing surface of the Brass gate valve has a certa...

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NAFCO | Brass Safety Valves for Water Heater

New Brass Safety Valves for Water Heater Time:2019-04-03 From: NAFCO | Brass Valve Manufacturer China As a professional brass valve manufacturer, We NAFCO always keep research and developement of new products, to meet requirements from different customers' demands and applications, representing latest technology for brass valves such as brass ball valves, brass gate valves, radiator valves, brass fittings. We newly develpoed a new seires of brass safety valve for water heater, specially designed low pressure water system, forged brass valve body, rating pressure 0.8MPa Overall View: Front Side View: Back Side View: Inlet Size View: With a cross design, to stop pipes or hoses getting inside, protect the valve structure and safety Outlet Side View: With NBR seat for better seal and avoid leakage What is a water heater safety valve? The water ...

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NAFCO | Torque Test of Brass Ball Valves

NAFCO | Torque Test of Brass Ball Valves Time:2018-08-09 From: NAFCO | Brass Valves China Manufacturer The tests described are type tests (laboratory tests) and not quality control tests carried out during manufacture. Tests shall be carried out in the sequence of this standard on the same brass ball valve. All tests shall be carried out with cold water of (20 ± 5) °C. The brass ball valve shall not be leaking or broken during the test, failing which the ball valve is not qualitified. 1.1.1 General Hold the ball valve in a rigid fixture as shown in Figure 1. a) All tests shall be carried out with connections to the valves (whatever their end fitting configurations) which are capable of withstanding the required torque values and bending moments (according to Table 1); b) if the inlet and outlet connection are not on a common axis, the torque tests shall be repeated with the connections reversed; c) ensure that the bending and torsional moments ca...

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