Global Steel is a leading manufacturer and supplier of Double Block & Bleed Valves. We offer high-quality products at reasonable prices. All products are manufactured with great care using premium raw materials and the latest technology. We are trusted by customers all over the world. We are stockholders of a wide range of Stainless Steel Valves which are available in a smooth surface finish.
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What are Double Block & Bleed Valves?
Installing a Double Block and Bleed Valve is like having three valves in one. A single valve having two seating surfaces that, when closed, provides a seal against pressure from both ends of the valve with a method of venting/bleeding the space between the seating surfaces is referred to as a double block and bleed valve in API 6D.
A few distinct designs of twin block and bleed valves exist. One design features an interior with two independently seating valves and a bleed or drain valve. Double isolation and bleed is the name of this arrangement (DIB). The DIB valve can isolate either side of the valve (bi-directionally)to vent or bleed the cavity and isolate pipework. This Val-Matic ball valve in the trunnion form offers a double block and bleed in a single valve. This design allows the valve cavity seats to be vented or bled by isolating the piping on both sides of the valve (uni-directionally).
Installation time, weight on the piping system and space are reduced when using a single, double block, and bleed valve system instead of three separate valves. Additionally, it decreases the number of leak pathways to the atmosphere, lowering the dangers associated with transporting liquids harmful to people or the environment.
What are the uses of double block and bleed valves?
When the valve cavity has to be bled, piping needs to be isolated for repair or in any of the following situations:
MOC | CS, SS, DSS, SDSS, SASS, MONEL, HASTELLOY, INCONEL, TITANIUM, TANTALUM. |
SIZES | “1/4 to 1/2” |
FUNCTION | 2 WAY, 3 WAY, 5 WAY |
BODY SHAPE | SQUARE, RECTANGLE |
WORKING PRESSURE | VALVES ARE ALSO AVAILABLE WHICH COULD HANDLE HIGHER PRESSURE, UP TO 6000 PSIG |
END CONNECTION | NPT, BSP, BSPT, TUBE OD, UNF, METRIC. |
TEMPERATURE RATINGS | (232C)/GRAFOIL 700 F(371C), PTFE 450F |
PRESSURE RATING | 3000, 6000, 9000 PSI |
APPLICATION | POWER/ GAS/ PETROLEUM/ CHEMICAL/ METALLURGY/ SHIPBUILDING ETC. |
ENDS | FLANGE ENDS, SCREWED ENDS,SOCKET WELD ENDS |
TYPE | R TYPE, T TYPE, H TYPE |
TEMPERATURE RATING | (232C)/GRAFOIL 700 F(371C),PTFE 450F |
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We offer These Double Block & Bleed Valves as per DIN, ISO, JIS or ANSI Standard.
DESCRIPTION |
BARSTOCK |
FORGING |
UNS GRADE |
CASTING |
---|---|---|---|---|
Carbon Steel |
A105 |
A105 |
K30504 |
A216 WCB |
Low Temp Carbon |
A350 LF2 |
A350 LF2 |
K03011 |
A352 LCB |
High Yield Steel |
A694 F60 |
A694 F60 |
K03014 |
– |
3 1/2 Nickel Steel |
A350 LF3 |
A350 LF3 |
K32025 |
A352 LC3 |
5 Chrome, 1/2 Moly |
A182 F5 |
A182 F5 |
K41545 |
A217 C5 |
1 1/4 Chrome, 1/2 Moly |
A182 F11 |
A182 F11 |
K11597 |
A217 WC6 |
2 1/4 Chrome, 1 Moly |
A182 F22 |
A182 F22 |
K21590 |
A217 WC9 |
9 Chrome, 1 Moly |
A182 F9 |
A182 F9 |
K90941 |
A217 WC6 |
13 Chrome |
A276 or A479 410 |
A182 F6A |
S41000 |
A351 CA15 |
304 |
A276 or A479 304 |
A182 F304 |
S30400 |
A351 CF8 |
304L |
A276 or A479 304L |
A182 F304L |
S30403 |
A351 CF3 |
316 |
A276 or A479 316 |
A182 F316 |
S31600 |
A351 CF8M |
316L |
A276 or A479 316L |
A182 F316L |
S31603 |
A351 CF3M |
317L |
A276 or A479 317L |
A182 F317L |
S31703 |
A351 CG8M |
321 |
A276 or A479 321 |
A182 F321 |
S32100 |
– |
347 |
A276 or A479 347 |
A182 F347 |
S34700 |
A351 CF8C |
17-4PH |
– |
A564 630 |
S17400 |
– |
Alloy 400 |
B164 N04400 |
B564 N04400 |
N04400 |
A494 M35-1 |
Alloy K500 |
B865 N05500 |
– |
N05500 |
– |
Alloy 800 |
B408 N08800 |
B564 N08810 |
N08800 |
– |
Alloy 825 |
B425 N08825 |
– |
N08825 |
– |
Alloy 600 |
B166 N06600 |
B564 N06600 |
N06600 |
A494 CY40 |
Alloy 625 |
B446 N06625 |
B564 N06625 |
N06625 |
A494 CW 6MC |
Alloy B2 |
B335 N10665 |
B564 N10665 |
N10665 |
A494 N 12MV |
Alloy C |
– |
– |
N10002 |
A494 CW6M |
Alloy C22 |
B574 N06022 |
B574 N06022 |
N06022 |
A494 CX2MW |
Alloy C276 |
B574 N10276 |
B564 N10276 |
N10276 |
A494 CW12 MW |
22% Duplex |
A276 or A479 S31803 |
A182 F51 |
S31803 |
A890 Gr 4A |
25% Duplex |
A276 or A479 S32750 or 60 |
A182 F53 |
S32750 or 32760 |
A890 Gr 6A |
254SMO |
A182 F44 |
A182 F44 |
S31254 |
A351 CK3MCuN |
904L |
B649 N08904 |
B625 N08904 |
N08904 |
– |
Titanium |
B348 Gr 2 |
B381 F2 |
R50400 |
B367 C2 |
VALVE SIZE | 1/8″ TO 1″ |
THREAD | NPT, BSPP, BSPT |
CONNECTION | THREADED, FLANGE END |
ORIFICE SIZE | 2 MM TO 9.5 MM |
END CONNECTIONS | DIMENSION | ||
Process Connection | Instrument Connection | A | B |
1/4″ FEMALE | 1/4″ MALE | 24 | 80 |
1/4″ FEMALE | 1/4″ FEMALE | 24 | 80 |
1/4″ MALE | 1/4″ MALE | 24 | 80 |
1/2″FEMALE | 1/2″ MALE | 30 | 115 |
1/2″ MALE | 1/2″FEMALE | 30 | 115 |
1/2″ MALE | 1/2″ MALE | 30 | 115 |
3/4″ FEMALE | 1/2″ MALE | 30 | 115 |
1/2″ MALE | 3/4″ FEMALE | 38 | 115 |
3/4″ FEMALE | 3/4″ MALE | 38 | 115 |
3/4″ FEMALE | 3/4″ FEMALE | 38 | 115 |
3/4″ MALE | 3/4″ MALE | 38 | 115 |
Application Industry
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Global Steel is a significant manufacturer and exporter of all ferrous and non-ferrous metals. As a pioneer and leader in the industry, Global Steel is at the forefront of technology and research.
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