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Double Block and Bleed (DBB) Plug Valve

Size range: NPS2”~36″
Pressure:Class150~900
Body material:A105, WCB, LCB, WCC, CF8, CF8M, CF3, CF3M, A890 4A, etc.
Operation:manual, gear box, electric, pneumatic, hydraulic, pneumatic-hydraulic
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Overview

Double Block & Bleed Plug Valve provides online-verifiable bubble tight sealing and is a safe and reliable replacement to the conventional two-valve system. In this valve, high integrity positive shut-off is obtained mechanically, independent of line pressure, without sealants/ lubricants.  

Features

  1. 1.There is no contact between the sealing surfaces. The valve’s long service life and small opening/ closing torque.
  2. 2.Thebottom cover is removed to replace the vane pair, thus it is very easy for the maintenance.
  3. 3.The valve’s body and plug are full-bore so that the medium can flow through the valve without any flow resistance and it’s also possible to clean the pipeline to overcome the shortcomings of the reduced port valve.
  4. 4.The valve is provided with an automatic bleed device(optional) which can prevent the abnormal pressure rise of the valve cavity and check the valve’s effect after the valve is completely closed.
  5. 5.The valve’s cavity is plated with hard chrome and the sealing area is hard and smooth.
  6. 6.The elastic seal on the vane is made of the fluorine rubber and molded and formed in a groove of the vane surface. The fireproof metal-to-metal seal is used as the backing of the elastic seal.
  7. 7.The valve’s opening/closing indicator is in sync with the opening/closing position and can accurately display the valve’s opening/closing status.

Technical Specifications

Double Block and Bleed (DBB) Plug Valve Reduced Bore Technical Parameters
TG4X-150LB
Size mm 15 20 25 32 40 50 65 80 100 125 150 200 250 300 350
in 1/2 3/4 1 11/4 11/2 2 21/2 3 4 5 6 8 10 12 14
L 108 117 127 140 165 178 190 203 229 254 267 292 330 356 381
H 230 260 300 340 380 435 460 490 525 570 625 700 780 870 980
W 120 140 140 180 200 220 260 280 300 340 400 450 450 500 500
TG4X-300LB
Size mm 15 20 25 32 40 50 65 80 100 125 150 200 250 300 350
in 1/2 3/4 1 11/4 11/2 2 21/2 3 4 5 6 8 10 12 14
L 140 152 165 178 190 216 241 283 305 381 403 419 457 502 762
H 230 260 300 340 380 435 460 490 525 570 625 700 780 870 980
W 120 140 140 180 200 220 260 280 300 340 400 450 450 500 500
TG4X-600LB
Size mm 15 20 25 32 40 50 65 80 100 125 150 200 250 300 350
in 1/2 3/4 1 11/4 11/2 2 21/2 3 4 5 6 8 10 12 14
L 165 190 216 229 241 292 330 356 432 508 559 660 787 838 889
H 230 260 300 340 380 435 460 490 525 570 625 700 780 870 980
W 120 140 140 180 200 220 260 280 300 340 400 450 450 500 500

Note: Technical specifications may change without notice due to ongoing technological advancements.

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