| Model： | ||
| Standard or Nonstandard： | Standard |
|
| Pressure： | LowPressure |
|
| Material： | castiron,ductileiron,carbonsteel |
|
| Media： | Water |
| PriceRange： | ||
| Structure： | GateNeedle |
|
| Power： | Manual |
|
| Temperature of Media： | NormalTemperature |
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Non-rising stem gate valve is a kind of gate valve that uses the non-rising stem structure.This valve is often more expensive but can be used when not much clearance is available.
Non-rising stems are generally only used where a space conflict may arise when the stem is extended. Where non-rising stem valves are used, it may be advisable to post a sign to alert plant personnel to not rely only on looking at the stem to determine the valve position. The rising stem design keeps the stem threads out of contact with the valve position. With a non-rising stem design, the threads remain internal to the valve bodu\y and may corrode, erode, or accumulate deposits on the stem threads, rendering operation difficult. Gate valves are equipped with an outside stem and yoke, giving rise to the term”OS&Y Gate Valve”. At the top of the yoke, a stationary yoke nut advances the lead screw when the handwheel is returned. This raise or lowers the gate.
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