Can gate valves be used for throttling service?

Gate valves should NOT be used for throttling service. Partially opening a gate valve creates high velocity flow and vibration that can damage the seat faces and cause premature failure. The design provides only two positions: fully open or fully closed. For throttling or modulating control, use globe valves, control valves, or butterfly valves. Using gate valves for throttling voids the warranty and can cause safety issues in high-pressure systems common in Saudi Arabian oil and gas facilities.

What documentation is required for gate valve export to Saudi Arabia (SABER)?

Export of gate valves to Saudi Arabia requires: (1) SASO/SABER Product CoC (Certificate of Conformity) obtained via the SABER portal, (2) Commercial Invoice with HS Code 8481.80, (3) Packing List, (4) Bill of Lading, (5) Manufacturer's Test Reports (API 598 hydrostatic and pneumatic seat testing), (6) Material Test Certificates (EN 10204 3.1) with PMI verification, (7) Certificate of Origin from Indian Chamber of Commerce, (8) ARAMCO Form 4-1514001 for approved source listing. Our export documentation package supports seamless customs clearance for Riyadh, Jeddah, and Dammam ports.

Forged Steel Gate Valves

1075 Forged Steel Gate Valve, Class-800 (Standard Bore)

Name: 1075 Forged Steel Gate Valve Class-800 Standard Bore
Brand: Supreme Valves India
SKU: SV-1075FORGEDSTEELGATEV
Availability: InStock
Rating: 4.8 (2 reviews)

High-pressure forged steel gate valve to API 602 / BS EN ISO 15761. Bolted bonnet, outside screw, yoke type, rising stem. Body and bonnet phosphated for rust resistance.

Test Pressure

Shell (Hydrostatic): 207 bar (3000 psig)
Seat & Back Seat (Hydrostatic): 152 bar (2200 psig)
Seat (Pneumatic): 6.9 bar (100 psig)
Max Working Temp: 425°C

Suitable For: Steam, Water, Oil

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Salient Features

Materials of Construction (MOC)

Component	Material Specification
Body & Bonnet	Ductile Iron (ASTM A536 / EN-GJS-400-15)
Stem / Spindle	SS 410 / SS 420
Seat / Trim	EPDM / NBR / Bronze

Technical Specifications

Parameter	Specification / Standard
Manufacturing / Design Standard	EN 1171 / AWWA C509 / BS 5163
Testing Standard	API 598 / EN 12266-1
Pressure Rating	PN16 / PN25

Sizes / Dimensions

Size (in)	Size (mm)	A ±1.5	B	C ~	ØD ~
1/2	15	85	1/2″	143	85
3/4	20	86	3/4″	146	85
1	25	101	1″	162	95
1 1/4	32	140	1 1/4″	226	155
1 1/2	40	140	1 1/2″	226	155
2	50	164	2″	230	155

~ ±10

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Purchase Options

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Material of Construction

S.N.	Parts Name	Material	Qty
01	Body	ASTM A 105/F11/F12/F22/F304/F316	1
02	Bonnet	ASTM A 105/F11/F12/F22/F304/F316	1
03	Disc	AISI 410/304/316	1
04	Seat Ring	AISI 410/304/316	1
05	Spindle	AISI 410/304/316	1
06	Gland	AISI 410/304/316	1
07	Gland Flange	ASTM A 105/Carbon Steel/F304	1
08	Stem Nut	NI-Rest-A 439 Gr. D2/EN 1A	1
09	Bonnet Gasket	Asbestos Filler SS 304 Spiral Wounded	1
10	Gland Packing	Graphite Asbestos with S.S. wire	Req
11	Bonnet Bolts	ASTM A 193 Gr. B7/B8	4
12	Eye Bolt & Nut	Carbon Steel / S.S. 304	2
13	Hand Wheel	C.I./M.S./D.I	1

Testing Details & Standards

Hydraulic Test 800# Body: 3000 PSIG
Hydraulic Test 1500# Body: 5400 PSIG
Hydraulic Test 800# Back Seat: 2000 PSIG
Hydraulic Test 1500# Back Seat: 4000 PSIG
Hydraulic Test 800# Seat: 2000 PSIG
Hydraulic Test 1500# Seat: 4000 PSIG
Pneumatic Test Seat: 80 PSIG

Dimension Tables

Table	Size	L	H	H1	ØA	Scr. Ends ØC	Scr. Ends E	SW Ends ØD Max	SW Ends ØD Min	SW Ends F-Min
FORGED STEEL GATE VALVES CLASS 800#	15	85	162	170	90	1/2"	13.56	22.22	21.72	9.65
FORGED STEEL GATE VALVES CLASS 800#	20	92	170	180	90	3/4"	13.87	27.56	27.05	12.7
FORGED STEEL GATE VALVES CLASS 800#	25	105	190	202	90	1"	17.35	34.29	33.78	12.7
FORGED STEEL GATE VALVES CLASS 800#	40	127	213	260	145	1 1/2"	18.38	49.15	48.84	12.7
FORGED STEEL GATE VALVES CLASS 800#	50	140	255	272	145	2"	19.23	61.62	61.11	15.75
FORGED STEEL GLOBE VALVES CLASS 800#	15	85	152	165	90	1/2"	13.56	22.22	21.72	9.65
FORGED STEEL GLOBE VALVES CLASS 800#	20	92	161	176	90	3/4"	13.87	27.56	27.05	12.7
FORGED STEEL GLOBE VALVES CLASS 800#	25	105	175	198	90	1"	17.35	34.29	33.78	12.7
FORGED STEEL GLOBE VALVES CLASS 800#	40	127	240	278	145	1 1/2"	18.38	49.15	48.84	12.7
FORGED STEEL GLOBE VALVES CLASS 800#	50	140	255	298	145	2"	19.23	61.62	61.11	15.75
FORGED STEEL GATE VALVES CLASS 1500#	15	92	170	180	90	1/2"	13.56	22.22	21.72	9.65
FORGED STEEL GATE VALVES CLASS 1500#	20	105	190	202	90	3/4"	13.87	27.56	27.05	12.7
FORGED STEEL GATE VALVES CLASS 1500#	25	127	243	260	145	1"	17.35	34.29	33.78	12.7
FORGED STEEL GATE VALVES CLASS 1500#	40	140	255	272	145	1 1/2"	18.38	49.15	48.64	12.7
FORGED STEEL GLOBE VALVES CLASS 1500#	15	92	161	176	90	1/2"	13.56	22.22	21.72	9.65
FORGED STEEL GLOBE VALVES CLASS 1500#	20	105	175	198	90	3/4"	13.87	27.56	27.05	12.7
FORGED STEEL GLOBE VALVES CLASS 1500#	25	127	240	278	145	1"	17.35	34.29	33.78	12.7
FORGED STEEL GLOBE VALVES CLASS 1500#	40	140	255	298	145	1 1/2"	18.38	49.15	48.64	12.7

Frequently Asked Questions

What is a gate valve and when should it be used?

A gate valve uses a flat or wedge-shaped gate that moves perpendicular to the flow direction to open or close. When fully open, the gate is completely withdrawn from the flow path, providing minimal pressure drop and maximum flow capacity. Gate valves are designed for on-off service only and should never be used for throttling. They are ideal for pipelines requiring full bore flow with minimal turbulence, such as crude oil transmission lines, refined product pipelines, and raw water intake systems in Saudi Arabian oil fields and UAE desalination plants.

What are API 600 gate valve pressure/temperature ratings?

Supreme Valves API 600 gate valves are available in Class 150, Class 300, Class 600, and Class 900 ratings for sizes from 2 inches to 48 inches. The Class 150 and 300 cast steel valves (WCB) are most common for general oil and gas service. For high-pressure Saudi Arabian gas pipelines and steam distribution systems, Class 600 forged steel valves (A105, F22) are specified. API 602 compact steel gate valves are available for smaller sizes up to 4 inches in Class 150-1500 ratings.

What's the difference between WCB and CF8M gate valve materials?

WCB (ASTM A216 Grade WCB) is a carbon steel casting material suitable for general service up to 425°C with good strength and machinability. CF8M (ASTM A351 Grade CF8M) is a stainless steel casting (316 SS) offering superior corrosion resistance, especially against chlorides and sour service. For seawater cooling systems in GCC countries, CF8M or Nickel Aluminium Bronze (NAB) is preferred. WCB with FBE coating is used for buried pipeline service where corrosion protection is provided externally.

How does a flexible wedge gate valve work in high-temperature steam?

A flexible wedge gate valve features a one-piece disc with a split stem connection that allows slight angular movement of the wedge seat faces. This flexibility compensates for thermal expansion and contraction during steam service, maintaining a tight seal throughout temperature cycles. The design prevents binding and ensures reliable shut-off in steam distribution lines up to 260°C. For superheated steam applications above 260°C, solid wedge design with hardfaced seats is recommended.

What is the difference between OS&Y and bolted bonnet gate valves?

OS&Y (Outside Stem and Yoke) gate valves have the stem threads visible outside the bonnet, providing clear visual indication of open/closed position and easy packing replacement without removing the actuator. Bolted bonnet designs have the stem internal to the valve body, offering a more compact profile but requiring disassembly for maintenance. OS&Y is preferred for critical oil and gas service and Saudi Aramco specifications, while bolted bonnet is used for smaller sizes and budget applications.