Sanco Globe valves are used where throttling or both throttling and shutoff are required. They can also be used for on-off service, but because of high pressure drop, this is generally confined to applications where the valve is normally closed and pressure drop is not important when the valve is open. Normally Sanco globe valves are installed with flow under the disc, but under certain conditions flow over the disc may have advantages.

Description

Sanco Globe valves are used where throttling or both throttling and shutoff are required. They can also be used for on-off service, but because of high pressure drop, this is generally confined to applications where the valve is normally closed and pressure drop is not important when the valve is open. Normally Sanco globe valves are installed with flow under the disc, but under certain conditions flow over the disc may have advantages. Standard globe valves, because they are designed for both throttling and shutoff, should not be used for prolonged throttling at less than 10% open. Internal damage can occur. Using a smaller valve or V-port trim to increase the percent open will often solve this problem. V-port trim has a more linear throttling curve than plug or ball discs, but none of these trims are recommended for continuous severe throttling which may require using a control valve. Pacific Valves will be glad to advise you on your application. Globe valves are available with a complete range of manual or remote actuators. See Actuators and Accessories section for more detail.
Ratings
Sanco Valves must only be used in operating conditions within the appropriate ANSI pressure-temperature ratings for valve class rating and body/bonnet material (see Technical Data section).
Temperature Limitations
Sanco Valves Only use valves within the temperature limitations of their construction. Temperature limitations of body/bonnet materials, trim, bolting, packing and gaskets must all be considered. Special construction for extended service temperatures are available on application.
Material And Service
Sanco Cast steel bolted bonnet valves are available in a variety of body/bonnet materials and trims. General service recommendations for body/bonnet materials appear on page 32 and for trims on page 33. Specified materials should be compatible with the service.

Material Details

Part Name Material Option
Body ASTM A 216 WCB / A 217 WC6 / A 217 WC9 / A 217 C5 / A 217 C12 / A 351 CF8 / A 351 CF8M / A 351 CF3 / A 351 CF3M / A 352 LCB
Bonnet ASTM A 216 WCB / A 217 WC6 / A 217 WC9 / A 217 C5 / A 217 C12 / A 351 CF8 / A `351 CF8M / A 351 CF3 / A 351 CF3M / A 352 LCB
Disc @ ASTM A 216 WCB / A 217 WC6 / A 217 WC9 / A 217 C5 / A 217 C12 / A 351 CF8 / A 351 CF8M / A 351 CF3 / A 351 CF3M / A 352 LCB
Disc Nut ASTM A 276 410 / A 276 304 / A 276 304L / A 276 316L
Stem ASTM A 276 410 / A 276 304 / A 276 304L / A 276 316L
Seat Rings @ ASTM A 216 WCB / A 217 WC6 / A 217 WC9 / A 217 C5 / A 217 C12 / A 351 CF8 / A 351 CF8M / A 351 CF3 / A 351 CF3M / A 352 LCB
Back Seat Bushing ASTM A 276 410 / A 276 304 / A 276 304L / A 276 316L
Gland ASTM A 276 410 / A 276 304 / A 276 304L / A 276 316L
Gland Flange Carbon Steel / Stainless Steel
Stem Nut ASTM A 439 Gr.D2 / Al. Bronze
Gland Packing Graphite Asbestos / Graphoil / PTFE
Bonnet Gasket Corrugated Soft Iron / Corrugated SS / Spiral Wound SS 304 with Asbestos or Graphoil / Octagonal Ring
Gland Eye – Bolt & Nut Carbon Steel / Stainless Steel
Cross Bolts & Nuts Carbon Steel / Stainless Steel
Hand Wheel Carbon Steel
Hand Wheel Nut Carbon Steel
Grub Screw Carbon Steel
Studs / Bolts ASTM A 193 Gr B7 / A 193 Gr B7M / A 193 Gr B8 / A 193 Gr B8M / A 320 Gr L7
Nut ASTM A 194 Gr B7 / A 194 Gr B7M / A 194 Gr B8 / A 194 Gr B8M / A 194 Gr 4/7
* Valves are available in Duplex & Super Duplex Stainless Steel and Nickel Aluminium Bronze. Please indicate Trim required and ask for individual technical data sheets provided separately for these special materials. @ CS & Alloy Steel Wedges and Seat Rings will be overlayed with 13% CR. or STELLITE 6 as per customer specifications.