Os And Y Gate Valve
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. Manufacturer & Wholesaler to the Fire Industry. Outside screw and yoke (OS&Y) gate valves are recommended when positive shutoff and a quick visual indicator of open/closed position is required. Expanding gate valves should not be use in steam service. In this style, the screw nut is supported by an A-frame type "yoke" outside of the enclosed body of the valve. Submittal Sheet & Technical Drawing. With an OS&Y valve it is always clear whether the valve is open or closed. Some of the above as well as some popular variants are discussed below. Rubber encapsulated iron wedge.
- Outside screw and yoke (os&y) gate valve
- Gate valve outside screw and yoke replacement
- Can you take a gate valve apart
Outside Screw And Yoke (Os&Y) 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. Lead Law Compliant: Yes. Height: 52-13/20 in. Collection: F-607-RWS. On a typical gate type valve a visual inspection cannot determine whether the valve is open or closed. Customary stem notch for switch installation and two factory plugged tapping bosses on valve body are some of the on-site application friendly designs. What Code and Standard are followed for gate valve? ISO Specifications: ISO 9001. Because a fire sprinkler main is dedicated for fire protection and not for any domestic use, you cannot test in the usual fashion if the water is on or not.
Gate Valve Outside Screw And Yoke Replacement
Both types are used extensively in all kinds of municipal and industrial water service. 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. Lunkenheimer Gate Valves. Flanged and screw ends. Four main types of discs are available in gate valves: 1. The gate design is always of the through conduit type. Internal pressure tends to create leaks in the body bonnet joint. Valve Operator: Hand Wheel. Our office is currently closed. Installation Preparation Checklist. In those situation these valve are used instead. Wedge Gate Valve: * The wedge shaped disc is utilised to introduce a high supplementary seating load that enables metal-seated wedge gate valves to seal not only against high, but also low, fluid pressures.
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. The two gate halves are forced out against the seats at point of closure providing a tight sealing without the assistant of fluid pressure. Product Specifications. The handle and shaft turns and the inner part of the valve opens and closes as the inside nut rides up and down internal shaft threads turning within the nut. Sometimes the packing nuts can be too tight or too loose. Two supporting webs between pipe flanges and body flange help strengthen valve against pipe line strain.
Can You Take A Gate Valve Apart
Simply tightening the packing nuts of screws will stop the leak. Gate valves provide straight through unobstructed passage way, which results in minimum pressure loss. Bronze, heavily constructed and rectangular in section. The knife edge pushes aside and cuts through solids in the flow. Coating: Fusion Bonded Epoxy. Options: - Stainless steel fasteners: Type 304 or 316. Valve Bonnet Type: Bolted. The resilient wedge, ductile iron gate valve features Class 125 flanged, flat face end connections for easy installation and accessibility. The RTI can also be specified in imperial units, where 1 ft is equivalent to 0.
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. If the valve handle on an OS&Y valve will not move, the packing may be too tight. Why is an OS&Y valve so important? The variants can be seen in below image. Stemalloy with Acme standard threads. Dedicated sprinkler valve handles must be painted green. The variant Pressure seal bonnet is described below. Dimensions, drilling and facing of flanges conform to American Cast Iron Flange Standard, Class 250 (ASME B16. Flexible-wedge disc. Outside Screw & Yoke (O. S. &Y. Pressure seal bonnet: The main feature about the pressure seal. When the stem of the OS&Y is raised out of the body you know the water is on.
API 602 (FOR SIZE 1/2" to 1-1/2"). The handle and the stem are both threaded so they interact together. In the fully closed position, gate valves provide a positive seal under pressure. The bulb breaks as a result of the thermal expansion of the liquid inside the bulb. Size 2 in A-Total Length 3. Fire Protection Resilient Seat OS&Y Gate Valve Flange End. VESDA Aspirated Smoke Detection for Jet (Impulse) Fans in Carparks - FlameStop TV Episode 42. Valve Size: Please select. 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. O-Ring: EPDM Rubber. Bodies 6″ and larger may be used with by-passes and drains. Gasket: EPDM Rubber.