Your personal data will be used to support your experience throughout this website, to manage access to your account, and for other purposes described in our privacy policy. Gate valves provide straight through unobstructed passage way, which results in minimum pressure loss. Never cut corners when it involves fire protection for your family or your property. 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. 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. Lunkenheimer Gate Valves are designed for dependable performance on high pressure steam, water, gas and oil lines. In this style, the screw nut is supported by an A-frame type "yoke" outside of the enclosed body of the valve. One piece solid wedge is used as they are easily made. API 602 (FOR SIZE 1/2" to 1-1/2"). Rising Stem/Inside Screw: Here the hand wheel and stem both rise, adequate clearance must be provided for operation. As the stem rises the gate inside the body of the valve rises in unison letting water flow through the body of the valve. 10-1973) for 250 lb Cast Iron Wedge Gate Valves.
A fire hydrant is a specialy OS&Y, globe valve where the shaft is totally encased and the nut is turned with a special wrench. Gaskets are carefully designed to produce a tight seal regardless of the line conditions that can be easily dismantled for maintenance operations. The closing is only made over one of the seats. Technically OS&Y stands for ' O utside Screw and Y oke'. You can look at an OS&Y gate valve. The NIBCO® flanged, ductile iron, gate valve is designed to be the main control valve in an automatic fire sprinkler system. The basic operation of this kind of valve, where the seal is achieved from the pressure exerted by the fluid flowing through the valve, is as follows: Internal pressure forces the bonnet upwards against the gasket, creating forces in the contact areas between the gasket and the bonnet and between the gasket and the body. AWWA C500 Solid Wedge. The resilient wedge, ductile iron gate valve features Class 125 flanged, flat face end connections for easy installation and accessibility. The more you know the safer you, your family, and your property may be. 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.
Bronze trim (IBBM) for dependable service on steam, water, gas and oil lines. All main control valves for fire protection must be ' O uter S tem & Y oke' type valves. Flanged valves conform to American Standard Face to Face Dimensions, Ferrous Flanged Valves (ASME B16. Each closed-head sprinkler is held closed by either a heat-sensitive glass bulb or a two-part metal link held together with fusible alloy such as Wood's metaland other alloys with similar compositions. Material: Ductile Iron, Rubber. Gate valves are tested according to – API 598 Standard. Suggested Specifications. Regular customer service hours resume on, at EST.
Afterwards remember to tighten pack the packing. 5" or 3" sprinkler main that was previously hooked up to a 2" tap connection. Thank you for shopping with American Backflow Products Company. Outside Screw & Yoke (O. S. &Y.
The knife edge pushes aside and cuts through solids in the flow. Both types are used extensively in all kinds of municipal and industrial water service. The purpose of these is to hold the packing material of the valve tightly in place so there are no leaks. Outside screw and yoke design keeps threads outside body where the do not come in contact with corrosive fluids. Product Specifications.
250psig (1725 kPa/17 barg) maximum working pressure - 500psig (3450 kPa/35 barg) static test. Large stuffing boxes; repackable under pressure when wide open. Because gate valves open slowly they also prevent water hammer effect. Flanged Ductile Iron OS&Y Resilient Wedge Gate Valve. Two supporting webs between pipe flanges and body flange help strengthen valve against pipe line strain. In those situation these valve are used instead. Certification: UL/FM. All water main valve handles must be the following: Dedicated standpipe valve handles must be painted red. Our office is currently closed for the weekend. Since the stem does not travel vertically, packing wear is reduced. In other words flushing a toilet or turning on a sink will not let you know if the fire sprinkler system is active.
OS&Y Valve 4" - 12" Flanged Ends. This valve has a bevel on knife edged single piece parallel slide gate valve and is designed to handle slurry, solids which are liable to obstruct a wedge gate. The valve size cannot be either larger or smaller than the service line size. Gate valves are designed for fully open and fully closed services; these are not used for flow regulation purposes. Dimensions, drilling and facing of flanges conform to American Cast Iron Flange Standard, Class 250 (ASME B16.
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. Advanced Control Technologies (ACT). Epoxy coated body inside and out per AWWA C-550 (coating NSF and FDA certified). Leviton Security & Automation (HAI). ISO Specifications: ISO 9001. In the fully closed position, gate valves provide a positive seal under pressure. Customary stem notch for switch installation and two factory plugged tapping bosses on valve body are some of the on-site application friendly designs. Application: Cold Working Pressure. And tell if it is open or closed by the position of the shaft. Wedge shaped solid and flexible gates are available.
Why is an OS&Y valve so important? 22 in Ship Weight 9. 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.
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