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Email: info@m-rao.in / sales@m-rao.in

Bolted Bonnet Gate Valve

Bolted Bonnet Gate Valve
ISOLATION SERVICE

Rising Stem Gate Valve

Design Conforming to API 600 / ASME B16.34

Our bolted bonnet, rising stem gate valves are engineered for severe isolation service. When fully open, the wedge withdraws completely into the bonnet, providing straight-through flow with minimum pressure drop and turbulency. This ensures clean pipelines and maximum coefficient values (Cv).

Size: 2" to 24" (DN50-DN600) Class: 150 / 300 / 600 Flanged ASME B16.5 Ends IBR Steam Certified option
₹ 2,850 /Piece
Operation Options Handwheel, Bevel Gear, Electric/Pneumatic Actuator
Seat Style Stellite-6 Hardfaced (13% Cr trim)
Bonnet Gasket Spiral Wound SS304 + Graphite
Test Certifications API 598 Seat & Shell Leakage
Request a Specs Sheet
BILL OF MATERIALS

Standard Parts & Metallurgy

No. Part Name Cast Steel Grade (ASTM A216 WCB) Stainless Steel 304 (ASTM A351 CF8) Stainless Steel 316 (ASTM A351 CF8M)
1 Body A216 Gr. WCB A351 Gr. CF8 A351 Gr. CF8M
2 Bonnet A216 Gr. WCB A351 Gr. CF8 A351 Gr. CF8M
3 Wedge (Disc) WCB + 13% Cr (Stellite 6) A351 Gr. CF8 A351 Gr. CF8M
4 Stem ASTM A182 F6a ASTM A182 F304 ASTM A182 F316
5 Seat Ring A105 + Stellite 6 A182 F304 + Stellite A182 F316 + Stellite
6 Gasket Spiral Wound SS304 / SS316 with Flexible Graphite fill
7 Gland Packing Graphite ring with Braided Carbon wire corner reinforcement
HYDROSTATIC TESTING

Hydrostatic Test Pressure (API 598 / BS 6755 PART-1)

Standard pressure testing values for valve body, back seat, main seat, and pneumatic seat leakage tests.

ASME CLASS HYDROSTATIC PRESSURE Kg/cm² (Psi) AIR TEST (SEAT) Kg/cm² (Psi)
BODY BACK SEAT SEAT
150# 30 (435) 22 (315) 22 (315) 7 (100)
300# 77 (1125) 57 (815) 57 (815) 7 (100)
600# 154 (2230) 115 (1655) 115 (1655) 7 (100)
800# 208 (3000) 141 (2000) 141 (2000) 7 (100)
900# 236 (3350) 172 (2445) 172 (2445) 7 (100)
1500# 302 / 392 (4375 / 5575) 222 / 287 (3200 / 4080) 222 / 287 (3200 / 4080) 7 (100)
2500# 552 / 652 (8000 / 9275) 407 / 477 (5900 / 6790) 407 / 477 (5900 / 6790) 7 (100)

* Note: For check valves, back seat & air test are not applicable.

DESIGN CODES

Engineering & Manufacturing Standards Compliance

VALVE TYPE DESIGN STANDARD (SMALL BORE 1/2" - 1-1/2") DESIGN STANDARD (LARGE BORE 2" - 24") COMPLIANCE PARAMETER STANDARD REF
BALL VALVE BS 5351 / ISO 17292 / API 6D PRESSURE-TEMPERATURE RATING ASME B16.34
GATE VALVE API 602 / ISO 15761 API 600 / BS 1414 (ABOVE 24") FACE TO FACE ASME B16.10
GLOBE VALVE BS 5352 / ISO 15761 BS 1873 FLANGED ENDS ASME B16.5 / BS-10 / DIN
LIFT / SWING CHECK VALVE ISO 15761 (LIFT TYPE) BS 1868 (LIFT / SWING) SOCKET WELD ENDS ASME B16.11
WAFER CHECK VALVE API 6D SCREWED ENDS ASME B1.20.1
NON SLAM CHECK VALVE DIN EN 558-2 BUTT WELD ENDS ASME B16.25
BUTTERFLY VALVE API 609 CAT-A (CENTER DISC) / API 609 CAT-B (OFFSET DISC) INSPECTION & TESTING API 598 / API 600 / BS 12266-1 / BS 6755-1
PLUG VALVE API 599 / API 6D FIRE SAFE DESIGN API 6FA / API 607
API TRIM CODES

Standard Trim Material Combinations

M-RAO manufactures valves with API standard trims for steam, water, oil, gas, and corrosive service.

TRIM NO. STEM MATERIAL SEAT FACING WEDGE / DISC FACING
TRIM 1 13% Cr (SS410) 13% Cr (SS410) 13% Cr (SS410)
TRIM 8 13% Cr (SS410) STELLITE 6 13% Cr (SS410)
TRIM 5 13% Cr (SS410) STELLITE 6 STELLITE 6
TRIM 2 SS304 SS304 SS304
TRIM 15 SS304 STELLITE 6 STELLITE 6
TRIM 10 SS316 SS316 SS316
TRIM 12 SS316 STELLITE 6 SS316
TRIM 16 SS316 STELLITE 6 STELLITE 6
TRIM 9 Monel (Ni-Cu Alloy) Monel Monel
TRIM 13 Alloy-20 (ASTM B473) Alloy-20 Alloy-20
TRIM 20 Bronze Bronze Bronze
SEAT METALLURGY

Seat Application & Material Grades

Specialized soft and metallic seat inserts engineered for chemical immunity, high pressure, and high temperature service.

Colour: White
Virgin PTFE

Inert to most chemicals, low coefficient of friction. Recommended for non-abrasive and non-corrosive chemicals.

Colour: Off White
15% Glass Filled PTFE

Withstands higher pressure than virgin PTFE. Excellent resistance to wear and deformation under load.

Colour: Grey White
20% Glass Filled PTFE

Similar to 15% glass filled PTFE with superior resistance to wear and load deformation in high-cycle valves.

Colour: Black
25% Carbon Filled PTFE

Suitable for steam and vegetable oils, low coefficient of friction for smooth operation.

Colour: Pale Black
Carbon Filled PTFE

Special for fumes and thermal oils, low coefficient of friction and zero pressure release under load.

Colour: Chrome White
Metal Back (SS316)

Suitable for high pressure and resistance to wear under load, temperature limit up to 60°C. Must not be used in oxygen presence.

DIMENSIONAL CHART

ASME Class 150 Gate Valve Dimensions

Nominal Size (inches) DN (mm) Face-to-Face (L) (mm) Flange O.D. (D) (mm) Flange Thickness (C) (mm) Approx Weight (kg)
2" 50 178 152 16 18 kg
3" 80 203 190 19 29 kg
4" 100 229 229 24 46 kg
6" 150 267 279 26 77 kg
8" 200 292 343 29 122 kg
10" 250 330 406 31 198 kg

* Custom face-to-face dimensions conforming to old pipeline structures can be custom-cast at our Ahmedabad plant upon request.

PRODUCT FAQ

Frequently Asked Questions

Got questions about size configurations, testing certificates, demo pricing, or lead times? Find quick answers below.

We cater to both single replacement unit orders and bulk project dispatches. Standard catalog demo prices start at ₹4,850 for 2" Class 150 WCB units, with volume discounts starting from 10+ units (₹4,200/unit) and 50+ units (₹3,750/unit).

Yes. Every M-RAO valve undergoes 100% hydrostatic shell & seat testing according to API 598 / BS 6755 Part-1. Original Manufacturer Test Certificates (MTC EN 10204 Type 3.1) and optional third-party inspection reports (TUV, DNV, BV, IBR) are shipped with the dispatch documentation.

Absolutely. While standard stock valves feature ASME B16.5 Class 150/300 flanging, our Narol, Ahmedabad plant can custom-machine flange faces to BS-10 Table D/E/F, DIN PN10/16, or custom PCD requirements upon request.

Standard WCB and CF8M stock valves are ready for immediate dispatch within 24-48 hours. Custom forged alloy or high-pressure Class 600/900 units typically require 10-14 working days for casting, machining, hydrostatic testing, and protective coating.
DIRECT RFQ

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Submit your specific nominal size, quantity, and metallurgical requirements below. Our Ahmedabad engineering desk will construct a custom drawing proposal.