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Outside Screw and Yoke, Flanged End. If an OS&Y valve leaks or the handle will not move. The basic design is suitable for use in a wide range of application eg well head isolation, process piping, tank etc. Expanding gate valves should not be use in steam service. EcoLink Intelligent Technology. Parts of Gate valve: Below is an image showing parts of a gate valve. Rising stem/outside screw and yoke construction is recommended where high temperatures, corrosives, and solids in the line might damage stem threads inside the valve. AWWA C500 Solid Wedge. Simply Automated Incorporated. Under standard testing procedures (135 °C air at a velocity of 2. Wedge shaped solid and flexible gates are available. ASME Specifications: ASME B16.
The knife edge pushes aside and cuts through solids in the flow. VESDA Aspirated Smoke Detection for Jet (Impulse) Fans in Carparks - FlameStop TV Episode 42. An OS&Y Valve (outside screw & yoke) functions by opening and closing via a gate, which lowers both in and out of the valve. Flanged Ductile Iron OS&Y Resilient Wedge Gate Valve. Electronic Solutions, Inc. - Elk Products. Even on a water main repair of an existing line for fire protection the main control valve should be checked that it is code compliant.
In this style, the screw nut is supported by an A-frame type "yoke" outside of the enclosed body of the valve. The fact that it is always perfectly clear whether an OS and Y valve is open or closed seems to add to it's longevity. One reason for that is, the expanding action can tend to trap hard particles between gate and seat. Because gate valves open slowly they also prevent water hammer effect. Dedicated sprinkler valve handles must be painted green.
Expanding gate valves are not recommended for sandy / abrasive service. 5" or 3" sprinkler main that was previously hooked up to a 2" tap connection. Bronze mounted (IBBM) to handle fluids for above service. These types of valve are more compact than the OS&Y. Packaging Info: - Quantity Per. Large stuffing boxes; repackable under pressure when wide open. Parallel Expanding Gate Valves: * These valves have inclined internal surface and parallel seats. Thank you for shopping with American Backflow Products Company. Higher the pressure in the system-better is the closing tightness. Ensure that your plumbing contractor doesn't either. If you are installing a new 2"copper main or a main smaller in size, you will be required to install the same size tap connection on the city main.
This design of gate valve is commonly used for clean fluids and steam applications. FLAMESTOP INFORMATION. ASTM Specifications: ASTM A-126 Class B, ASTM A-276, ASTM A-307, ASTM A-536, ASTM B-148, ASTM B-150, ASTM B-584, ASTM D-2000, ASTM F-912M. Flanges save 1/16″ raised face. The gate design is always of the through conduit type. Slab Gate Valves: * These have a single parallel faced slab gate, which sides over floating seats. Model: RGA33 Series. Afterwards remember to tighten pack the packing. Installation Preparation Checklist. Combination standpipe valve handles must be painted yellow.
Flanged and screw ends. J&S Metal Seated Gate Valves design and materials exceed AWWA C500 for long life. In a non-rising stem (NRS) gate or globe valve, the shaft screw nut is built into the INTERNAL valve disk or the valve plug. The NIBCO® flanged, ductile iron, gate valve is designed to be the main control valve in an automatic fire sprinkler system. Installation Manual. The valve wheel is attached to this nut either directly or through gearing and as they both turn, the nut, acting on the external screw threads causes the shaft to rise or lower into the valve body pulling or pushing the valve disk to open or close the valve. There is a packing gland around the where the shaft enters the valve body. Epoxy coated body inside and out per AWWA C-550 (coating NSF and FDA certified).
In the open position, the backseat helps protect the stem threads; but, care must be taken to protect the stem externally. 250Nb R/G Gate Valve OS&Y. Connection: Flange End. The RTI can also be specified in imperial units, where 1 ft is equivalent to 0. FlameStop Shitbox Rally - WEDNESDAY UPDATE! Four main types of discs are available in gate valves: 1. Simply tightening the packing nuts of screws will stop the leak. HomeSeer Technologies. On every OS&Y valve there is a packing nut, or packing screws. It is more difficult with an OS&Y globe valve because the shaft movement is short. But it goes much farther than that, in that an OS&Y valve provides unique protection that a typical gate valve or ball type valve cannot provide. Collection: F-607-RWS. The stem of the valve itself raises and lowers visibly outside the body of the valve, while the handle remains in a fixed position.
When the hand wheel is turned, the stem rises as the yoke bushing engages the stem threads. Gate vales ≤ 2" are provided with reduced port (sometimes called conventional or standard). API 602 (FOR SIZE 1/2" to 1-1/2"). EPDM disc and O-rings. The stem being visible, clearly being either raised or lowered, takes much of the guesswork out of operating the valve. Frequently if a leak appears on an OS&Y valve it is because the packing is too loose. Thrust faces of the nut and the yoke hold the nut in a fixed position as the shaft (or "stem") rises of lowers without turning.
Valve Size: Please select. Manufacturer & Wholesaler to the Fire Industry.