Gate Valve Stuffing Box

Add an air release valve if necessary.

Gate valve stuffing box.

The gate valve will not pass a pressure test. Knife gate valve issues knife gates are some of the most common valves used in slurry service. The box is a cylindrical assembly typically of bronze comprising a sleeve threaded on one end to accept adjusting and locking nuts. The stuffing box is filled with a material called packing the function of which is to stop leakage.

Deposits are removed in travel so nothing builds up on the seating surfaces that could cause leakage. Pipe valve hydrant ul fm series resilient wedge gate valves are available in non rising stem nrs with indicator post flange piv non rising stem with awwa style stuffing box and outside screw and yoke os y with handwheel piv resilient wedge gate valves with indicator post flange have triple o ring seals non rising stems with a 2 square wrench nut and are. Manual wheel electric actuator pneumatic or hydraulic cylinders. Gv nr s gate valves are the most common type of valve used for isolation.

The serie 500 dampers are manufactured with an adjustable stuffing box around the blade ensuring that no leakage to the atmosphere will occur. The valve consists of a main body section and bonnet inside which a valve disc travels up or down the spindle by means of a disc nut. Stuffing box packing is allowing water to leak. The gate of this valve is attached to a stem which goes through a stuffing box located in the bonnet.

While some knife gates seal on the valve stem with a standard cylindrical stuffing box many seal on the gate with a rectangular stuffing box. Note that o rings started being used in 1952. Stuffing box hex bolt thrust washer body seat ring disc seat ring op nut hex bolt nrs stem nut nrs o ring stuffing box bonnet body hex bolt stem o rings. Gate valve non rising spindle stuffing box design product code.

Deep stuffing boxes are standard on gate and globe valves. Serie 500 is a very robust construction manufactured in square or round design. Water is leaking from the stuffing box area. In many small fiberglass boats for example the stuffing box is mounted inboard near the point the shaft exits the hull.

Deep stuffing boxes can be fitted with a split carbon or bronze bushing. Remove stuffing box and replace the stem o rings and the stuffing box packing. The damper can be operated in a variety of ways.