The basic design is suitable for use in a wide range of application eg well head isolation, process piping, tank etc. Our office is currently closed for the weekend. Combination standpipe valve handles must be painted yellow. Wedge gate valve does not shut off against high pressure gas as efficiently as slab or expanding gate valve so in those cases the later is specified. What is O S & Y Gate valve and how is it different from a normal Gate valve? Fire Protection Resilient Seat OS&Y Gate Valve Flange End.
System pressure is used to provide isolation. The stem being visible, clearly being either raised or lowered, takes much of the guesswork out of operating the valve. In those situation these valve are used instead. Flanged valves conform to American Standard Face to Face Dimensions, Ferrous Flanged Valves (ASME B16. Options: - Stainless steel fasteners: Type 304 or 316. 250Nb R/G Gate Valve OS&Y. Gaskets are carefully designed to produce a tight seal regardless of the line conditions that can be easily dismantled for maintenance operations. Parallel Slide Gate Valves: * These are made with 2 body pieces assembled with a spring in it. One quick look at an OS&Y valve with the stem raised out of the body of the valve and you will know that the water is on. Customary stem notch for switch installation and two factory plugged tapping bosses on valve body are some of the on-site application friendly designs. Residental or Contractor *. Parts of Gate valve: Below is an image showing parts of a gate valve.
When the handle is turned counter clockwise, the gate will open allowing the water to flow through freely. All main control valves for fire protection must be ' O uter S tem & Y oke' type valves. 34 (IN GENERAL FOR LARGE SIZE). Meets or exceeds performance requirements of AWWA C509 and C515 for 3 in and larger valves. This is vitally important for properly maintaining fire protection. The NIBCO® flanged, ductile iron, gate valve is designed to be the main control valve in an automatic fire sprinkler system. In the fully closed position, gate valves provide a positive seal under pressure. Must be locked in the open position to ensure fire protection is active.
Material: Ductile Iron, Rubber. With a OS&Y valve, as the stem turns, it moves into or out of the valve, which also moves the gate to open or seal the valve. As the stem rises the gate inside the body of the valve rises in unison letting water flow through the body of the valve. In most cases when installing a new 3" ductile iron sprinkler service or larger, you will be required to install a wet connection of equal size to the pipe unless approved plans state otherwise. Outside Screw & Yoke (O. S. &Y. AWWA C500 Gate Valve is the most robust gate valves on the market. While parallel disks are used in valves having parallel seats, other three: solid, flexible and split wedges are used in valves having inclined seats. Valve Body Style: Flanged. Expanding gate valves are not recommended for sandy / abrasive service.
Leaks most commonly arise at the contact surface between the gasket and the body. 2016-12-30 18:56:02. Electronic Solutions, Inc. - Elk Products. That means that when the handle is turned it directly raises and lowers the gate of the valve by interacting directly with the stem of the valve. Bodies 6″ and larger may be used with by-passes and drains. Parallel Expanding Gate Valves: * These valves have inclined internal surface and parallel seats. EcoLink Intelligent Technology.
How does a fire sprinkler head operate? With other water gate valves, visual inspections will not determine if the valve is opened or closed. Wedge: EPDM Coated Ductile Iron. Resources: - Operating Instructions Manual. Application: Cold Working Pressure. In this style, the screw nut is supported by an A-frame type "yoke" outside of the enclosed body of the valve. Non rising Stem/Inside Screw: Non rising stem/inside screw design has the chief advantage of requiring minimum headroom for operation. Flexible wedges have a grove cut in it, which makes it sit on the seat surface more easily.
Thank you for shopping with American Backflow Products Company. 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. Ensure that your plumbing contractor doesn't either. The NIBCO® ductile iron gate valve provides full flow with minimal pressure drop. AWWA Specifications: AWWA C-509, AWWA C-515, AWWA C-550.
All valves must be UL Listed (UL stands for Underwriter Laboratories, which is a global independent science company). 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. If an OS&Y valve leaks or the handle will not move. George Risk Industries. Model: RGA33 Series. Valve Operator: Hand Wheel. Handwheel – open left or open right. 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. Bronze, heavily constructed and rectangular in section. When the handle is turned clockwise the gate will close preventing any water from traveling through the valve. STI - Safety Technology International. Valve Type: Resilient Wedge Gate Valve. OS&Y valves visibly show whether the valve is opened or closed which differs from a domestic water service where you can simply turn on the shower or sink to test its functionality.
In addition to visual inspection, NYC code also requires that all handles and visual standpipe (sprinkler line) must be color coded. Double disc-parallel faced. Large stuffing boxes; repackable under pressure when wide open. When installing a new water main for fire protection it is vitally important to use the correct main control valve inside the building. The glass bulb or link applies pressure to a pip cap which acts as a plug which prevents water from flowing until the ambient temperature around the sprinkler reaches the design activation temperature of the individual sprinkler.
AWWA C500 Solid Wedge. Certification: UL/FM. This differs from a Wet Connection on a domestic water service where the tap connection would be one size smaller than the pipe. Rubber encapsulated iron wedge. Pressure seal bonnet: The main feature about the pressure seal. These are normally though conduit type but may also be available without a conduit. When are OS&Y Valves Required?
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It is unclear what may have caused the incident. Serving Burlington WI, Waterford WI, Twin Lakes WI and the surrounding area. Burlington iowa accident today. The City of Burlington Police Department in Wisconsin confirmed to The Sun that "three adult occupants sustained life-threatening injuries" in the shocking crash on Wednesday evening. The woman sustained life-threatening injuries in the crash, and died due to those injuries at the scene. At CARFAX, we collect events from the lives of millions of used cars from 20 European countries, as well as the USA and Canada.
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