Double Block and Bleed Valves: DBB-01  

Double Block and Bleed Valve (FxF)
Working Pressures: 100 | 250 bar (1500 | 3600 PSI)

TECVAL tecval-dbb-01-2-


TECVAL Data sheet DBB-01

Data sheet

TECVAL DBB-01 series, enables you to reduce drastically space and weight in the process of installations. It reduces the possibility of leaks and the maintenance. Their distribution diagram consist of two ball valves to block the line and one needle valve to bleed in 90º outflow.


  • Process interface in one compact ball/needle/ball valve assembly.
  • Temperature range -20ºC/200ºC (-4ºF/392ºF).
  • Standard reinforced PTFE seats up to 100 bar (1500PSI).
  • Smooth operating.
  • No ejectable ball and needle stem design.
  • Anti-leak ball stem with double o-ring seal.
  • No maintenance required.


  • PEEK seats for high pressures up to 250bar (3600PSI).
  • Inlet, outlet and vent ports screwed BSP.
  • Male-Female (MxF) end connections.
  • Male-Male (MxM) end connections.
  • Plug in vent port.
  • O-ring seals in several materials.

Technical data

Temperature Range

-20ºC/200ºC (-4ºF/392ºF)


Threaded NPT (ANSI B1.20.1)
Threaded BSP (DIN ISO 228-1)

Dimensions 1/4"3/8"1/2"3/4"1"
Orifice Size 68121520
Flow Coefficient (Cv) 3591829

AISI-316L (1.4404)

SuperDuplex (1.4410/1.4501)

Special alloys (For detailed information consult attached data sheet)


PartAISI-316L SuperDuplex Special alloys 
1 Handle screwAISI-316L (1.4404)AISI-316L (1.4404)AISI-316L (1.4404)
2 Handle washerAISI-316L (1.4404)AISI-316L (1.4404)AISI-316L (1.4404)
3 Inlet HandleAISI-316L (1.4404)AISI-316L (1.4404)AISI-316L (1.4404)
4 Oulet HandleAISI-316L (1.4404)AISI-316L (1.4404)AISI-316L (1.4404)
5 Stop PinAISI-304 (1.4301)AISI-304 (1.4301)AISI-304 (1.4301)
6 StemAISI-630 (1.4542)Superduplex (1.4410/ 1.4501)Special alloy
7 Stem o-ringFPMFPMFPM
8 Stem bearingDelrinDelrinDelrin
9 BallAISI-630 (1.4542)Superduplex (1.4410/ 1.4501)Special alloy
10 SeatReinforced PTFEReinforced PTFEReinforced PTFE
11 Oulet ConectorAISI-316L (1.4404)Superduplex (1.4410/ 1.4501)Special alloy
12 Connector O-ringFPMFPMFPM
13 Inlet ConnectorAISI-316L (1.4404)Superduplex (1.4410/ 1.4501)Special alloy
14 BodyAISI-316L (1.4404)Superduplex (1.4410/ 1.4501)Special alloy
15 Bar HandleAISI-316L (1.4404)AISI-316L (1.4404)AISI-316L (1.4404)
16 Set screwAISI-304 (1.4301)AISI-304 (1.4301)AISI-304 (1.4301)
17 StemAISI-316L (1.4404)Superduplex (1.4410/ 1.4501)Special alloy
18 NutAISI-316L (1.4404)AISI-316L (1.4404)AISI-316L (1.4404)
19 GlandAISI-316L (1.4404)AISI-316L (1.4404)AISI-316L (1.4404)
20 PackingP.T.F.E.P.T.F.E.P.T.F.E.
21 BonnetAISI-316L (1.4404)Superduplex (1.4410/ 1.4501)Special alloy
TECVAL dbb01-desp
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