hawa - ball valves, check valves, double block & bleed valves, plug valves, gate valves, globe valves, butterfly valves, cryogenic valves.

Gate Valves

Pressure Seal Bonnet

Our Features

Hawa Pressure Seal Gate Valves have been designed to meet the re q u i rements of API 600 - ISO 10434 / BS 1414 / API 6D-ISO 14313 /ASME B 16.34
Face to Face and End to End dimensions conform to ASME B 16.10 / ISO 5752 / BS 2080 / DIN
End flange dimensions conform to ASME B 16.5 / ISO 7005-1 / 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 for ease of operation.
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
All the valves provided with backseat arrangement duly satellite faced
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 securely welded Seat-rings are satellite faced cylindrical bottom seated type having ample cross section for strength
The gasket design ensures self sealing under pressure
The inner row of studs establish the initial seal of the Pressure seal joint
Valves meet the requirements of fugitive emission levels Shell category B as per MESC SPE 77/312

Our Features

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
Can be supplied with "GRAYLOC END HUB", under project license from GRAYLOC PRODUCTS ®, UK.

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 Up Ring	ASTM A 216 WCB / A 351 CF8 / A 351 CF8M
Thrust Ring/b>	ASTM A 216 WCB / A 351 CF8 / A 351 CF8M
Back Seat Bushing	Stellited
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	Graphoil
Gasket	Soft Iron / SS 304 / Graphoil
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
* 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.