SENTRY BPRV and VREL Sample Line Pressure Regulators
The SENTRY BPRV back pressure regulator and VREL pressure reducer protect sensors on the sample line. Sold and serviced in Türkiye by Tetra.
Installation, calibration, spare parts and service in Türkiye come from Tetra; cabinet and panel integration can be done at our İzmir facility.
Technical information
- BPRV standard setting
- 20 psi (1.38 bar)
- Optional range
- 5-42 psi (0.34-2.90 bar)
- VREL operating pressure
- Sample lines above 35 bar
- VREL minimum flow
- 150 ml/min
- Material
- Wetted parts 316 stainless steel and Viton
SENTRY BPRV (Back Pressure Regulator / Relief Valve) is used to protect analyzer sensors measuring on the sample line from high pressure and to provide stable flow. If pressure exceeds 1.4 bar, the relief valve opens and discharges the sample water without passing it to the measurement cells. It is a standard component in SWAS panels and online analysis stations.
VREL (Variable Pressure Reducing Element) is used as a diaphragmless pressure reducer on sample lines with pressure above 35 bar; it controls flow, can be cleaned in place and provides a minimum flow of 150 ml/min.
BPRV / VREL features
- BPRVa-5, BPRVa-12 and BPRVa-20 models; diaphragm kit as a spare part
- Standard BPRV-20: fixed setting of 20 psi (1.38 bar), no adjustment required
- Optional pressure range: 5-42 psi (0.34-2.90 bar)
- Wetted materials: 316 stainless steel and Viton
- VREL: pressure reduction on lines above 35 bar, laminar flow, wear-resistant
If you provide your line pressure and desired set value, Tetra will select the suitable BPRV or VREL.
Spare parts and consumables
Write to us for spare parts and consumables; the Tetra service team supplies and replaces the right original parts for your instrument.
Ask about spare parts →Products from SENTRY Equipment
Let's choose the right product together
Tell us about your application; we will recommend the right model and configuration for the measuring point, process conditions and regulations.