Gate Valve Handwheel Orientation

If the valve owner indicates that the valve may be installed in the stem horizontal position the guides should be hardfaced to prevent the dreaded cock and lock. They are operated by a threaded stem which connects the actuator generally a hand wheel or motor to the stem of the gate. The ball is held away from the seat by the stem so as to avoid abrasion.

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Hi everyone could somebody give me a tip regarding the gate valves on horizontal line with its handwheel at horizontal position.

Gate valve handwheel orientation.

For parties repairing gate valves 14 inches and larger a close examination of disc and body guides is in order. Turn the hand wheel clockwise to close the valve and turn the hand wheel counter clockwise when opening the valve. If the valve has a rising stem its position can be seen just by looking at the position of the stem. It is good practice on psv discharge block valves closed systems to orient the gate valve handwheel stem either horizontally or below horizontal horizontal discharge line installations.

If this arrange will not be of gate valve installation pipelines piping and fluid mechanics engineering eng tips. Ideally all the gate valves in a distribution system will open the same way but at minimum you want to know which ones might be backward i e opposite the majority. A red nut indicates that the valve opens to the. Damage due to incorrect installation is not covered by our warranty.

The valve nearest the pipe when installing. Otherwise body threads may be damaged causing the valve to leak. Gate valves work by inserting a rectangular gate or wedge into the path of a flowing fluid. With the valve in the open position clockwise rotation of the handwheel causes the ball to rotate clockwise until the port through the ball is perpendicular to the flow stream.

There have been instances where the gate valve wedge has separated from broken off of the valve stem consequently blocking the relief path. During installation note the color of the operating nut. Some gate valves open left and some open right.