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SWASTIK INDUSTRIES
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Gate Valves

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Gate valves are largely designed to start or stop a flow when a straight line flow of fluid and minimum flow restriction are needed. In service, these gate valves are pretty much kept either fully open, or fully closed.

When turned open, the disc of the gate is completely removed allowing materials to pass. even though this gives the valve good shut-off property and bidirectional, they cannot be quickly open or close and are responsive to shaking when open.

Gate Valves Features

  • Swastik Industries Steel Gate Valves have been designed to meet the requirements of API 600 / BS 1414 / API 603 / API 6D /ASME B 16.34
  • Face to Face and End to End dimensions conform to ASME B 16.10 /BS 2080 / DIN
  • End flange dimensions conform to ASME B 16.5 / API 605 / BS 3293 / DIN
  • Butt weld end dimensions conform to ASME B 16.25
  • The stem nut design allows for the removal of the hand-wheel while keeping the Stem and Gate in a fixed position.
  • Anti-frictional Ball bearings are provided in higher sizes and classes.
  • The strength of Stem to Gate connection is stronger than the strength of the Stem at the root of the operating thread
  • Outside screw and yoke construction
  • Bi-directional shut-off
  • The gland is of self aligning two piece type Deep stuffing box
  • Body ports are streamlined, permitting unobstructed flow, reduces turbulence, results in lower pressure drop & lower erosion
  • The Seat-rings are cylindrical bottom seated type having ample cross section for strength are provided with welded in and threaded Seat-rings will be supplied on request. In case of SS valves the Seat-rings are integral to Body
  • The Body to Bonnet joint is flat in ASME 150# valves, a male and female joint is used in 300# & 600# and ring joint is used in higher classes
  • Gate Valves meet the requirements of fugitive emission levels Shell category B as per MESC SPE 77/312

Gate Valves Options

  • Solid, flexible, split wedge, double disc and parallel Slide Gate configurations available
  • For low temperature and cryogenic services (cold box and non-cold box applications) extended bonnet as per BS 6364 available
  • Locking arrangement
  • Gear, Electrical, Hydraulic or Pneumatic actuator available

Gate Valves Materials

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
Wedge@ 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
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
Lock Nut Carbon Steel / SS 304
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
Grease Nipple Carbon Steel
Grub Screw Carbon Steel
Studs / Bolts ASTM A 193 B7 / A 193 B7M / A 193 BBM / A 320 L7
Nut ASTM A 194 2H / A 194 8 / A 194 8M / A 194 4 / 7

Gate Valves 150 Class

Size DN 50 65 80 100 125 150 200 250 300 350 400 450 500 600 650 700 750 800 900 1000 1050
L-RF 171 191 203 228 254 267 292 330 355 381 406 432 457 508 559 609 609 660 711 812 860
**L1-BW 216 241 282 304 381 403 419 457 501 571 609 660 711 812 863 914 914 965 1016* 1066* 1143
H (approx) 425 435 535 600 705 800 1010 1250 1385 1575 1825 1950 2080 2425 2750 2825 3175 3473 3600 4100 4500
ØW 200 250 250 280 300 350 450 500 350* 350* 350* 350* 400* 400* 450* 450* 500* 500* 500* 500* 500**
Wt. ( approx ) kg 22 29 37 56 78 84 138 210 310 450 565 740 927 1125 1425 1550 1950 2200 3050 3265 4250

Gate Valves 300 Class

Size DN 50 65 80 100 125 150 200 250 300 350 400 450 500 600 650 700 750
L-RF, LI- BW 216 241 282 305 381 403 419 457 502 762 838 914 990 1143 1244 1346 1369
H (approx) 430 475 535 605 715 845 1075 1260 1425 1585 1845 1995 2175 2650 2850 3050 3270
H (approx) 425 435 535 600 705 800 1010 1250 1385 1575 1825 1950 2080 2425 2750 2825 3175
ØW 200 200 250 300 300 350 450 500 500 350* 400* 450* 450* 500* 500* 500* 550*
Wt. ( approx ) kg 28 40 53 80 125 152 245 360 532 725 950 1350 1648 2350 2900 3400 4100
Gate Valves Gate Valves Gate Valves

Gate Valves Body and Bonnet

The Gate Valves body has a straight through port without recesses except at the seat area. This ensures minimum turbulence, erosion and resistance to flow. This ensures accurate alignment of stem as well as a smooth operation. Long integral guide ribs in the body match with guide slots in the wedge for accurate alignment and guidance. Bonnet castings are of one-piece design, where the yoke is integral with the bonnet for gate valves of sizes up to 12” (300mm). Bolted bonnets are generally used in large sized of gate valves as well as in applications where pressure and load is expected to be higher.

Gate Valves are used for separation services in Oil and Gas, Petrochemical, Fossil Fuel and Nuclear Power, Steel, Chemical, Fertilizer, Mining and Solar sectors offering excellent shut-off features as well as minimal pressure loss through the valve. A gate valve is used for a wide range of liquids as well as provides a tight seal when closed. Gate Valves are of flexible wedge, outside screw and yoke and bolted-bonnet construction.

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