Outside Screw and Yoke OS Y Gate Valve - Flanged OSF
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.
Technical Features
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• Sizes available (Nominal) : 2”/DN50, 2½”/DN65, 3”/DN80, 4”/DN100, 5”/DN125, 6”/DN150, 8”/DN200, 10”/DN250 and 12”/DN300, 14"/DN350, 16"/DN400, 18"/DN450, 20"/DN600, 24"/DN600
• Working Pressure : 300psi/21bar (2"-12"), 250psi/17bar (14"-24")
• Seat type : Resilient wedge
• Finish : Fusion bonded epoxy coated internal and external
• Connections : Flange diameter and thickness according to ANSI B16.1 Class 125, EN1092-2 PN10 or EN1092-2 PN16
• Specifications : Design and dimensions conform to AWWA C515.
• Features : Pre-notched, stainless steel stem for easy attachment of supervisory switch
• Approvals : UL & FM (2"-12" as OSF, 14"-24" as OSF2) 5” is only UL listed
Specifications
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Structure
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Installation
1. Piping systems and valves should be thoroughly cleaned and free ingress of foreign materials.
2. Visually inspect the valve seating and ports for cleanliness immediately prior to installation.
3. All valves should be independently supported against movement and stress the connected piping system.
4. Ensure that the valve pressure rating is compatible with service conditions.
5. Operate the valve at least once the open to closed position.
6. Verify that packing nuts are tight before pressurizing the system.
7. Gate valves are not suitable for throttling applications.
8. Gate valves should be installed in the vertical position on horizontal pipework and in the horizontal position on vertical pipework.
Inspection and Maintenance
1. Valves should be inspected periodically and should be cycled to prevent buildup of foreign materials in the piping system and valve body.
2. 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.
3. Always shut down the system before repacking the valve. Valves are designed with backseats for repacking under pressure but this is not recommended
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