Technology:
Advantage
Features:
@Delivers Leak-proof connection
@Easy to install
@Excellent vacuum and pressure ratings
@Interchangeable & re-tighten
@High strength
@High Corrosion resistance
@Longer service life
@Hassle free operations
Major Features:
@Safe and trustworthy
@High Quality
@Worth Buying
@Precise Process
Our services
Pre-sale Service
After-sale service
Custom design
Product consulting
Free drawing
Providing samples within 3 days
15 days delivery time
Installation instructions
24 consulting service
Quality complaints
Company Information:
Welcome to ROKE! Information of Nantong ROKE fluid equipment CO.,LTD.
1.Established in .
2.We are professional manufacturer of Instrumentation Tube Fittings, Pipe Fittings, Needle valves, Ball Valves, Check Valves, Valve Manifolds, DIN Fittings, SAE Flanges, Sampling systems, Water Heater Accessories.
3.Products are available in the variety of different materials, such as Carbon Steel,Stainless steel 316/316L, Duplex, Super Duplex, Hastelloy, Monel, Inconel, Incoloy, Titanium .
4.We located in Nantong City, 2 hours drive to shanghai with convenient transportation access worldwide. We will arrive Shanghai in 41minutes next year.
5.Our products are widely used in industries of Chemical, Petrochemical, Power Generation, Oil, Gas, Shipbuilding.
6.Always available to discuss your requirements and ensure full customer satisfaction.
7.We have CNC machine, 3D measure equipment, Raw Material chemical composition inspection equipment, High pressure test equipment, etc.
8.We have obtained ISO- certificate
9 Our products are exported to the United States, Japan, Germany, South America, South Africa, Southeast Asia and many other countries...
10.We also welcome OEM and ODM orders. Please feel free to contact and visit u
Welcome to ROKE! Information of Nantong ROKE fluid equipment CO.,LTD.1.Established in .2.We are professional manufacturer of Instrumentation Tube Fittings, Pipe Fittings, Needle valves, Ball Valves, Check Valves, Valve Manifolds, DIN Fittings, SAE Flanges, Sampling systems, Water Heater Accessories.3.Products are available in the variety of different materials, such as Carbon Steel,Stainless steel 316/316L, Duplex, Super Duplex, Hastelloy, Monel, Inconel, Incoloy, Titanium .4.We located in Nantong City, 2 hours drive to shanghai with convenient transportation access worldwide. We will arrive Shanghai in 41minutes next year.5.Our products are widely used in industries of Chemical, Petrochemical, Power Generation, Oil, Gas, Shipbuilding.6.Always available to discuss your requirements and ensure full customer satisfaction.7.We have CNC machine, 3D measure equipment, Raw Material chemical composition inspection equipment, High pressure test equipment, etc.8.We have obtained ISO- certificate9 Our products are exported to the United States, Japan, Germany, South America, South Africa, Southeast Asia and many other countries...10.We also welcome OEM and ODM orders. Please feel free to contact and visit u
You will get efficient and thoughtful service from Xiangyu.
Suppliers of A351 CF8 304 Block And Bleed Needle Valve
Double Block Bleed Valve is a combination of a bleed valve with two block valves. This is a design structure that can allow for two way flow when necessary and to effectively control the liquid flow inside the system. There are different types of valves such as the Double Block Bleed Needle Valve which uses a needle for the block valves. The operation is by rotating the handle attached to the stem which is connected through a threaded bore to the needle. There can be a plug, needle, gate or knife at the end of the stem inside the body of the valve. The Double Block And Bleed Plug Valve uses a plug to sit on the seating and to close and open the valve gate.
Stainless Steel double block and bleed valve
A351 CF8 304 Block And Bleed Needle Valve
SS 316 Double Block And Bleed Steam Valve
Biggest Supplier of Stainless Steel Double Block And Bleed Ball and Butterfly Valve
The plug could be rubber or metallic depending on the material flowing inside the valve. The Double Block And Bleed Gate Valve is another type which uses gates to control the flow through the block valves. The gate is attached to the stem and the stem descends or ascends into and out of the body. The gate can be made up of steel or other high alloy materials. The Double Block And Bleed Knife Gate Valve uses a knife that is connected to the stem. The knife is essentially a gate that has a sharp edge. The knife gates are used to cut through high viscous liquids. The double block bleed valves are efficient and have less or no water hammer effects.
Double Block Bleed Valve Specification Table
Size
50NB &#; 600NB
Pressure
150PS1
Temperature
0 Deg C - Deg C.
Body , Chest
Solid One piece casting of Cast Iron Fg 260, Cast Steel Gr WCB ,CF8,CF8M.
Seat
Integral to Body, Soft, Optional.
Gate
AISI SS 304,316,316L,317,317L
Screw Spindle
AISI SS 410,304,316.
Nut
Brass
Yoke
Plate type of MS .
Gland Follower
Cast Iron , Cast steel , Ductile Iron ,CF8,CF8M.
Hand Wheel
Cast Iron , Cast steel , Ductile Iron
Gland Packing
PTFE , PTFE Impregnated
Ends
Lugged
Port
STANDARD [Round], Optional V Port, Diamond Port,.
Double Block Bleed Needle Valve Manufacturing Standards
Parameter
Standard
Design
API 6D/ ISO
Pressure-Temperature Rating
ASME B16.34
Face-to-Face
ASME B16.10 from 2&#; to 18&#;, Manufacturer standard for 20&#; and above
End Flanges
ASME B16.5, ASME B16.47-Series A
Actuator/ Gear Mounting Flange
ISO
Pressure Testing
API 6D
Fire Test
API 607/ ISO
Fugitive Emission
ISO , Part 1
Double Block And Bleed Plug Valve Materials of Construction
Components
Materials
Body
ASTM A216 Gr WCC + ENP
Plug
ASTM A216 Gr WCC + ENP
Segment
ASTM A395 Gr 60-40-18
Seal
Viton
Bonnet
ASTM A216 Gr WCC
Radial Bearing
Stainless Steel backed PTFE
Packing
Flexible graphite
O-Ring
Viton B
Drain Plug
SS 410
Bottom Plate
ASTM A216 Gr WCC
Gasket
Flexible graphite
Gland Flange
ASTM A216 Gr WCB
Outer Stem
ASTM A479 Type 410
Inner Stem
ASTM A479 Type 410 Condition 3
Stud
ASTM A193 Gr B7
Hex Nut
ASTM A194 Gr 2H
Cavity Pressure Relief System
SS 316
Class 150 Double Block Bleed Valve Dimensions
ASME, Class
Size
A
B
C
CD**
ØF
NPS*
DN*
150
2
50
178
455
150
85
49
3
80
203
470
175
100
74
4
100
229
490
190
140
100
6
150
267
640
225
200
150
8
200
292
670
260
255
201
10
250
330
710
290
340
252
12
300
356
785
330
425
303
14
350
381
800
380
465
334
16
400
406
410
535
385
18
450
432
440
590
436
20
500
813
495
670
487
24
600
914
570
820
589
30
750
705
735
Dimensions Table of Class 300 Double Block Bleed Valve
ASME, Class
Size
A
B
C
CD**
ØF
NPS*
DN*
300
2
50
216
455
150
85
49
3
80
283
470
175
100
74
4
100
305
490
190
140
100
6
150
403
640
225
200
150
8
200
419
670
260
255
201
10
250
457
710
270
330
252
12
300
502
775
345
415
303
14
350
762
825
395
465
334
16
400
838
875
445
515
385
18
450
914
925
495
565
436
20
500
991
975
545
615
487
24
600
600
665
589
600
2
50
292
395
130
80
49
3
80
356
395
130
80
74
4
100
432
495
185
105
100
6
150
559
660
230
180
150
8
200
660
690
280
250
201
10
250
787
930
405
280
252
12
300
838
970
435
350
303
ASTM A351 CF8M Dbb Gate Valve Manufacturers in India, Ready Stock of Double Block And Bleed Steam Valve valve
Bore Size of Double Block Bleed Valve
Designator
Size
1
9.5 mm (3/8&#;)
2
14 mm (1/2&#;)
3
19 mm (3/4&#;)
4
25 mm (1&#;)
5
38 mm (1 ½&#;)
6
42 mm (1- 11/16&#;)
7
50 mm (2&#;)
Double Block And Bleed Gate Valve Process Connection Flange Size
For more information, please visit Double Block And Bleed Ball Valve.
Designator
Size
8
1/2
12
3/4
16
1
24
1-1/2
32
2
48
3
Working pressure of Double Block & Bleed Valves
Working pressure
PN 10 - PN 400
Available double block bleed valve Types
ASTM A351 CF8M Dbb Gate Valve
SS Double Block And Bleed Steam Valve
CF8M Stainless Steel Integral Double Block And Bleed Valve
Stainless Steel 304 1/2 npt Dbb Ball Valve
A351 CF8 Self Bleeding Ball Valve
Cast Iron Block And Bleed Valve
Maximum temperature of Double Block And Bleed Plug
Maximum temperature
-400˚ to 850˚F
Features of Double Block Bleed Valve
- Stainless Steel, Duplex, A105
- Savings on space, weight,
- Installation and cost
- Increased safety
- Easy installation and maintenance
- PEEK or PCTFE seats
View Price List of CF8M Stainless Steel Integral Double Block And Bleed Valve, Available 1/2 npt Dbb Ball Valve in Wide Range of Sizes
Seat Material Operating Temperature Range
Operating Temperature Range
PEEK Seat : -65&#;(-54&#;) to 400&#;(205&#;)
PCTFE Seat : -22&#;(-30&#;) to 356&#;(180&#;)
Maximum Operating Pressure of 1/2 Npt Double Block And Bleed Valve
Maximum Operating Pressure
Class ( psig) @ 100&#;(38&#;)
In-house Test Facilities for Double Block And Bleed Plug Valve
- Antistatic Test
- Drive-train Strength Test
- Endurance Test
- Fire Test
- Fugitive Emission Test
- Torque Test
Double Block and Bleed Valve Advantages
- Prevent product contamination.
- Remove equipment from service for cleaning or repair.
- Meter calibration.
- Liquid service near waterways or municipalities.
- Transmission and storage.
Check A351 CF8 Self Bleeding Ball Valve Specification, SS Block And Bleed Valve Distributor
Applications of Double Block And Bleed Knife Gate Valve
For more China 3 Way Ball Valve Manufacturerinformation, please contact us. We will provide professional answers.
- Pressure Instrument Take-off Points.
- Sampling Systems, Where A Pipeline Probe Is Integral With Our Valve.
- Chemical Injection Systems, Where A Check Valve Is Part Of Our Valve Assembly.
- Drains For Tanks And Pipes, Where Space Is Restricted.
- High Pressure Firesafe Diverter Valves.