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

Gate Valves

Bolted Bonnet API 600

Our Features

Hawa Valves Cast Steel Gate Valves have been designed to meet the requirements of API 600 - ISO 104 34 / BS 1414 / API 603 / 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 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
All the valves provided with backseat arrangement
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 ISO PN 20 / ASME 150# valves, a male and female joint is used in PN 50 / 300# & PN 110 / 600# and ring joint is used in higher classes
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 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
* 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.