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. OS&Y Valve 4" - 12" Flanged Ends. AWWA C500 Solid Wedge. EcoLink Intelligent Technology. Expanding gate valves should not be use in steam service. The purpose of these is to hold the packing material of the valve tightly in place so there are no leaks. The resilient wedge, ductile iron gate valve features Class 125 flanged, flat face end connections for easy installation and accessibility. An OS&Y Valve (outside screw & yoke) functions by opening and closing via a gate, which lowers both in and out of the valve. Lead Law Compliant: Yes. Below is a animation of pressure seal bonnet gate valve: According to Stem Construction: there are three types of stem features which can be found in gate valve construction: (1) Rising stem/outside screw and yoke, (2) Rising stem/inside screw, (3) Non rising stem/inside screw. Therefore, excessive force is less likely to be used in operating the valve. In addition, because they are UL rated, they seem to be better constructed than many other typical water valves.
Lunkenheimer Gate Valves. You can look at an OS&Y gate valve. Do not use brute force to make the handle move. Gaskets are carefully designed to produce a tight seal regardless of the line conditions that can be easily dismantled for maintenance operations. Submittal Drawing 1. Dimensions, drilling and facing of flanges conform to American Cast Iron Flange Standard, Class 250 (ASME B16. Submittal Sheet & Technical Drawing. Internal pressure tends to create leaks in the body bonnet joint. NSF Specifications: NSF 372, NSF 61. HomeSeer Technologies.
Flanged end drilling complies with ASME/ANSI B16. Rubber encapsulated iron wedge. 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. The time it takes before a bulb breaks is dependent on the temperature. Valve Disc Material: Ductile Iron. 34 (IN GENERAL FOR LARGE SIZE). On a typical gate type valve a visual inspection cannot determine whether the valve is open or closed. Courtesy of wikipedia. Please Note: Currently, the Water and Mechanical product range are only available in QLD, NSW, VIC and ACT. The closing is only made over one of the seats. What is a Gate Valve? The stem of the valve itself raises and lowers visibly outside the body of the valve, while the handle remains in a fixed position. 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.
In both types the valve packing also acts as a guide. Gate vales ≤ 2" are provided with reduced port (sometimes called conventional or standard). The valve size cannot be either larger or smaller than the service line size. Meets or exceeds performance requirements of AWWA C509 and C515 for 3 in and larger valves. Under standard testing procedures (135 °C air at a velocity of 2. Height: 52-13/20 in. The two gate halves are forced out against the seats at point of closure providing a tight sealing without the assistant of fluid pressure. Username or email address *. 22 in Ship Weight 9. The AWWA C500 Standard establish the minimum required to construct metal seated gate valves.
Part #NF607RWSLF10 | Item #7052142 | Manufacturer Part #NS2920M. In the fully closed position, gate valves provide a positive seal under pressure. When the handle is turned clockwise the gate will close preventing any water from traveling through the valve. In an NRS valve, the stem will turn to open and close the gate, but the stem does not move up or down as it turns. Residental or Contractor *. Large stuffing boxes; repackable under pressure when wide open. When the hand wheel is turned, the stem rises as the yoke bushing engages the stem threads. Valve Operator: Hand Wheel. The knife edge pushes aside and cuts through solids in the flow. Bodies 6″ and larger may be used with by-passes and drains. 96 lbs Quantity per Case 6. Flanged Ductile Iron OS&Y Resilient Wedge Gate Valve. One reason for that is, the expanding action can tend to trap hard particles between gate and seat.
Lunkenheimer Gate Valve: Fig 1436 IBBM. Suggested Specifications. Afterwards remember to tighten pack the packing. Heat, corrosion, erosion, and solids may damage the stem threads inside the valve and cause excessive wear.
J&S Valve - Series 3900 - AWWA C500 - Metal Seated Gate Valve, Ductile Iron, NRS, Flange, with 2" operating nut. Select Size: Search Results View all results. Simply Automated Incorporated. The variants can be seen in below image. Flexible wedges have a grove cut in it, which makes it sit on the seat surface more easily. Wedge: EPDM Coated Ductile Iron. Heavier in comparison with wedge or slab type. You can still place orders on or send questions via our contact form. Pressure seal bonnet: The main feature about the pressure seal. Listed by UL/ULC (UL262).
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. OS&Y means Outside Stem and Yoke. Features: - UL 262 Listed and FM 1120/1130 Approved and certified to ANSI/NSF 61 & 372. Two supporting webs between pipe flanges and body flange help strengthen valve against pipe line strain. Flexible-wedge disc. Slab Gate Valves: * These have a single parallel faced slab gate, which sides over floating seats. Epoxy Coated interior and exterior surfaces. AWWA C500 Gate Valve is the most robust gate valves on the market. Other states will follow in the coming... 80Nb R/G Gate Valve OS&Y. Split-wedge disc, 4. Our office will resume its operations in.
Flanged and screw ends. Valves like wedge type when closed in heat lines during hot temperature may be very difficult to open in cold temperature due to expansion. Four main types of discs are available in gate valves: 1.
Pressure Class: 300#. In the open position, the backseat helps protect the stem threads; but, care must be taken to protect the stem externally. The more you know the safer you, your family, and your property may be. Collection: F-607-RWS. Frequently if a leak appears on an OS&Y valve it is because the packing is too loose.
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