The failure to eliminate soft sealing gate valve

     Chinabase Machinery is a group of manufacturing facilities, offering one-stop solution for mechanical power transmission products in China. We can supply a full-range of power transmission products, such as chains, sprockets and plate wheels, pulleys, gearboxes, motors, couplings, gears and racks. Our product range also covers locking assemblies (clamping elements/locking device),timing pulley， taper bushes, QD bushes, bolt-on hubs, torque limiters, shaft collars, motor bases and motor slides, chain detachers, chain guides, universal joint, rod ends and yokes. 

    China Gears and racks manufacturer, we can supply: Spur Gears, Bevel Gears, Worm Gears, Helical Gears, Automobile Gears, Agricultural machinery gears, Spiral Bevel Gears, Helical Bevel Gear, Rack

Fault elimination

    1 soft sealing gate valve packing leakage

(1) the packing gland too loose, can evenly distribute thecompression packing gland nut is screwed with.

(2) the insufficient number of packing ring, packing should beincreased.

(3) packing due to the use of too long or improper preservationfailure, should be replaced with new packing, must pay attention tothe joint among each circle should cross staggered 1200replacement.

Fluid Couplings

   2 soft sealing gate valve gate and valve seat sealing surface

(1) is arranged between the sealing with dirt, can be washed to eliminate.

(2) such as a sealing surface damage, should be re grinding, when necessary, can be re surfacing and processing, the sealing surfacegrinding must be flat, the roughness of not less than 0.4.

3 soft sealing gate valve body and junction leakage of the valve cover nut is not screwed tight or uneven elastic, can be readjustment.

(1) the flange seal damage surface (straight furrow or groove marksetc.) should be corrected.

(2) gasket is damaged, should be replaced with new gaskets.

4 soft sealing gate valve stem drive is not flexible

(1) packing down tight, should be appropriate to loosen the nut on the packing gland.

(2) the packing gland position is not correct, the valve stuck, should be evenly screw the nut on the packing gland, the gland recovered to normal position.

(3) screw stem and stem nut on damage, should be opened after the cancellation.

Soft sealing gate valve widely used. Soft sealing gate valve, valveindustry, soft sealing gate valve is a gate opening and closing parts, RAM direction of motion perpendicular to the direction of the fluid, valve can only be fully open and fully closed, can not be adjusted and the throttle. There are two gate sealing surface, the most common mode of gate valve sealing surface to form two wedge, wedge angle varies with the valve parameters, usually 50,medium is not high temperature is 2 ° 52''''.