Fisher YD & YS Universal Globe Valves – Sliding Stem Valves

Fisher YD & YS Universal Globe Valves are part of the sliding stem valve range that are designed for throttling or flow-switching (on/off) service.

YD (Balanced) – For general converging (flow-mixing) and diverging (flow-splitting) service. Available in standard and high-temperature versions

YS (Unbalanced) –For general converging service. When used in diverging service, recommended for on-off applications only

Fisher YD & YS product range is available for a wide range of applications, including sulphide and chloride stress-cracking environments common to the oil and gas production industries.

Fisher YD & YS Universal Globe Valve

Product Features

Economy—Balanced valve plug construction in the YD permits use of smaller, lower-cost actuators. A single one-piece valve accommodates both trim designs and uses Fisher easy-e bonnets, gaskets, and packing, thus cutting spare part inventory costs.
Application Flexibility—Multipurpose capability results from a valve designed specifically for three-way control. A variety of valve sizes, end connections, port diameters, and trim materials provides design versatility for your control needs.
Excellent Sealing Capabilities—The ENVIRO-SEAL packing system option is available. This packing system provides excellent sealing, guiding, and loading force transmission. The improved sealing of the ENVIRO-SEAL system can help control emissions to below the EPA (Environmental Protection Agency) limit of 100 ppm (parts per million) from valves. The ENVIRO-SEAL packing systems feature PTFE, Graphite ULF, or Duplex packing with live-loading for reduced packing maintenance.
Long Trim Life—Hardened trim materials provide excellent wear resistance.
Easy Maintenance—Cage-type construction simplifies inspection and removal of parts.
Parts Commonality—Packing parts, including packing flange, studs and nuts, and packing kits are common to the YD, YS, and Fisher easey-e control valves.
Valve Plug Stability— Rugged cage guiding provides high valve plug stability, which reduces vibration and mechanical noise

Fisher YD & YS Universal Globe Valve – Construction Detail

FISHER YD & YS UNIVERSAL GLOBE VALVE

PRODUCT Specification

Valve Sizes, Ratings, and End Connections (1,2)	Cast Iron Valves Flanged: NPS 1 through 6 CL125 flat-face or 250 raised-face flanges per ASME B16.1 Screwed: NPS 1/2 through 2 consistent with ASME B16.4 Steel and Stainless Steel Valves Flanged: NPS 1 through 8 CL150, 300, and 600 raised-face or ring-type joint flanges per ASME B16.5 Screwed or Socket Welding: NPS 1/2 through 2 consistent with ASME B16.11 Buttwelding: NPS 1 through 8(5). All available ASME B16.25 schedules that are consistent with ASME B16.34
Maximum Inlet Pressure and Temperature(1)(2)	Cast Iron Valves Flanged: Consistent with CL125B or 250B per ASME B16.1 Screwed: Consistent with flanged CL250 per ASME B16.4 Steel and Stainless Steel Valves Flanged: Consistent with CL150, 300, and 600(3) per ASME B16.34 Screwed or Welding: Consistent with flanged CL600(3) per ASME B16.34
Shutoff Classifications Per ANSI/FCI 70-2 and IEC 60534-4	YD Standard Design: Class IV High-Temperature Design: Class II YS Standard Class: Class IV Optional Class: Class V (NPS 1 through 4)
Construction Materials	Valve Body and Bonnet:J Cast iron (except extension bonnet), J WCC steel, J WC9 chrome moly steel, or J CF8M (316 SST)
Flow Characteristic	Linear
Valve Plug Styles	YD: Balanced, metal-seated YS: Unbalanced, metal-seated
Options	Lubricator or lubricator/isolating valve for packing lubrication J Drilled and tapped connection in extension bonnet for leakoff J ENVIRO-SEAL live-loaded packing systems(4)

1. PN (or other) ratings and end connections can usually be supplied; please contact 2. The pressure or temperature limits in this bulletin and any applicable standard limitations should not be exceeded. OPERATIVE LIMITS term is defined in SAMA Standard PMC 20.1. 3. Certain bonnet bolting material selections may require a CL600 easy-e valve assembly to be derated. Please contact. 4. For additional information, see Bulletin 59.1:061 ENVIRO-SEAL and HIGH-SEAL Packing Systems for Sliding-Stem Valves. 5. BWE not available for NPS 8 with high temperature trim, see figure 2. Lower cage cannot be removed unless bottom flange adaptor is removed.

Installation of Fisher YD & YS Universal Globe Valves

Although YD and YS valves may be mounted with the actuator in any position relative to the valve, the normal position is with the valve in a horizontal run of pipe and the actuator vertical above the valve.

See how Fisher Control Valves provide safe, efficient and intuitive flow control.

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➡ Did you know? Fisher Control Valves are approved, certified and classified to international standards including ASME, CSA, IEC, NACE, FDA & NFPA. Should you require assistance with valve specification for explosion-proof or intrinsically safe applications in the hazardous area industries, please contact T&D.