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OSY Gate Valve, Rising Stem, Flanged end, ANSI Gate Valve
Outside Stem Type Gate Valve provides a visual indication of the valve's open/closed position. Applications include fire sprinkler systems. This shut-off OSY gate valve features a resilient wedge gate valve that includes stainless steel internals and stem, and outside stem and yoke.
Our full capacity of this Outside Stem Type Gate Valve provides one-stop solution on customized service. Our gate valves are available in stainless steel and carbon steel body, as well as you can custom this rising stem gate valve on wedge types including solid wedge or flexible wedge design, and materials including bronze, stainless steel, stellite, and other specific alloys.
Key Benefits:
Sizes available in 1/2"- 12"
Working Temperature: -20 degree - 797 degree F
Working Pressure: Class 150/Class 300
Rising stem, OSY gate valve
Body: ASTM A351 CF8M/CF8, WCB
Disc: ASTM A351 CF8M/CF8, WCB/STL plus 13
Stem: SS316/304, 20Cr13
Gland Packing: PTFE or 304 plus GRAPHITE
Design Standard: ASME B16.34/API600/API603
Flange Dimension: ASME B16.5
Face to face: ASME B16.10
Testing Standard: ASME B16.34/API600/API603
The outside-screwand-yoke (OSY) design. prevents thread wetting because the threaded portion of the stem is outside the valve. The stem passes through a yoke, which is formed by two arms that extend up from the bonnet and joint to form a housing for a yoke nut (also called a stem nut, yoke bushing, or stem bushing). Unlike the other stem designs, the hand wheel is attached to the yoke nut rather than to the stem. The yoke nut is free to turn but is held in place at the top of the yoke by a yoke-nut retainer, which also acts as a bushing for the nut. The yoke nut has a left-hand internal thread that mates with the thread on the stem. The stem thread is left-handed so that turning the hand wheel clockwise moves the stem downward, closing the valve. In this design the stem does not turn and may be pinned to the gate; The position of the gate within the valve is easily determined from the position of the top of the stem. The OSY design is standard for all sizes of cast iron and steel gate valves.
Stem designs, external leakage along the stem is prevented by the use of deformable non-metallic packing. The packing is located in the bonnet in a circular cavity commonly known as the stuffin box or packing chamber. In valves using ISRS and NRS stem designs, the packing is held in place by a tubular gland backed by a hollow packing nut that threads onto the top of the bonnet. In valves using the OSY stem design, the packing arrangement is more complicated. The packing is held in place by a gland, which is backed by a gland flange. The gland flange is restrained by a pair of gland bolts and nuts, which are, in turn, fastened to the bonnet using eyes and pins or some comparable arrangement.
Beliebte label: draußen Stamm tippe Tor Ventil, GATENVENTIL, Betriebssystem, 10 Gate Ventil, 1 PVC -Gattentätelventil, 6 GATENVENTIL, 4 Messing -Gate -Ventil
