Outside Screw and Yoke (OS&Y) Gate Valve - Grooved
OSG
Technical Features
- Sizes available (Nominal) : 2”/DN50, 2-1/2”/DN65, 3”/DN80, 4”/DN100, 5”/DN125, 6”/DN150, 8”/DN200, 10”/DN250 and 12”/DN300
- Working pressure :21 bar (300 psi)
- Seat Type: Resilent wedge
- Finish :Fusion bonded expoxy coating internal and external
- Connections : Grooved metric or AWWA C606 standard
- Specification : Design and dimensions conform to AWWA C515
- Features : Pre-notched, stainless steel stem for easy attachment of supervisory switch
- Note : Size 5” is only UL listed
Outside Screw and Yoke (OS&Y) Gate Valve - Grooved - OSG
Physical Data
Outside Screw and Yoke (OS&Y) Gate Valve - Grooved - OSG
Materials List
Installation
- Piping systems and valves should be thoroughly cleaned and free from ingress of foreign materials.
- Visually inspect the valve seating and ports for cleanliness immediately prior to installation.
- All valves should be independently supported against movement and stress from the connected piping system.
- Ensure that the valve pressure rating is compatible with service conditions.
- Operate the valve at least once from the open to closed position.
- Verify that packing nuts are tight before pressurizing the system.
- Gate valves are not suitable for throttling applications.
- Gate valves should be installed in the vertical position on horizontal pipework and in the horizontal position on vertical pipework.
Inspection and Maintenance
- Valves should be inspected periodically and should be cycled to prevent buildup of foreign materials in the piping system and valve body.
- In the event of a packing leak adjust the packing nuts to increase pressure on the stem packing. Packing nuts should be tightening evenly approximately a quarter turn in a clockwise direction.
- Always shut down the system before repacking the valve. Valves are designed with backseats for repacking under pressure but this is not recommended.
Operation
Gate valves are manually operated multi-turn valves and are opened by a handwheel or other operating device, generally in a counter clockwise direction and then closed clockwise.