| Model： | ||
| Standard or Nonstandard： | Standard |
|
| Pressure： | MediumPressure |
|
| Material： | Forged |
|
| Media： | Oil |
|
| Brand Name： | Byho |
| PriceRange： | ||
| Power： | Manual |
|
| Temperature of Media： | NormalTemperature |
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Single disk gate valves are used where the flow is always one way (like sluices on dams). There is some flexibility in the attachment of the disk to the stem, so the differential pressure on the disk pushes it against the seat, sealing it off.
The second chapter mainly introduces the structure of Single disk gate valves: handwheel, gland and flange, gland bolts and nuts, bonnet bolting, body, bonnet bushing, stem, seat rings and slab in detail. The spoked handwheel of the Single disk gate valves is fabricated from steel pipe. The hub is coupled with the yoke sleeve by means of a tongue. The gland and flanges are in forged steel and are supplied in two pieces, self aligning design to permit the gland to descend parallel to the stem even if the eyebolts are unevenly tightened. The forged steel gland bolts of Single disk gate valves are of the eyebolt type which can be swung outward for ease of gland repacking. They are fixed to the bonnet by hinge pins. The Single disk gate valve’s body is in cast steel. The basic dimension, i.e. wall thickness, face to face and flanges comply with the relevant API and ANSI standards. The body-to-bonnet flange is circular, expect in the Class 300 and ring joint on Class 400 and above. Bosses are provided for drain taps. The bonnet bushing or backseats is in forged stainless still and forms part of the trim. The stem of the single disk gate valve is in forged stainless steel and is part of the trim. The stem is provided with a T head. A ground backseat is provided to ensure a perfectly tight seal to the stuffing box when the valve is fully open. The stem is ground to minimize friction and prevent damage to gland packing. The threading is trapezoidal ACME type. Dimensions comply with the API 600 standard. As for the rings, they are in forged stainless and are part of the trim. The slab of the single disk gate valve is also forged stainless steel for diameters up to 12” and is in cast steel for larger valves. It is connected to the stem by means of a T joint.
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