Tescom 26-2900 Series

TESCOM™ 26-2900 Series is a dome load negative bias backpressure tracking regulator with a balanced main valve. Controls upstream pressures to 1000 PSIG [69 bar] with spring bias setting. Ideal for use in constant bias applications like offshore diving, dumping exhaled breath from pressure chamber (BIBS) or diving bell.

Features & Benefits

  • Balanced stem design eliminates the need to adjust bias over a wide range of operating pressures
  • High flow capacity: Cv = 2.0
  • Diaphragm sensed
  • Low accumulation
  • Mounts in any position
  • Choice of Stainless Steel or Brass construction
  • Designed for BIBS Applications


Pressure Rating

Maximum Control Pressure: 1,000 PSIG [70 bar]
Maximum Reference Pressure: 1,000 PSIG [70 bar]
Bias Pressure Ranges: 0, 0-15, 0-30 PSIG [0, 0-1, 0-2 bar]



Body: 303 Stainless Steel or Brass
Seat: CTFE
Diaphragm: (unreinforced) Viton-A®
O-rings: Viton-A®
Back-up Rings: Teflon®
Remaining Parts: 300 Series Stainless Steel & Brass


Operating Temperature

0°F to +165°F [-18°C to +74°C]


Port Size & Type

1/2″ SAE, 1/2″ NPT, 1/2″ MS33649, 1/2″ BSP


Flow Capacity

Cv = 2.0


Load Type




Stainless Steel: 10.0 lbs. [4.50 kg]
Brass: 10.5 lbs. [4.75 kg]