Ralston Block and Bleed Valves
Block and bleed valves for Quick-test calibration setups — keep the system pressurized while venting the device under test (brass to 3,000 psi, stainless to 5,000 psi)
Pick your exact configuration in the ordering table below to add it to your cart.
Same-day response on quotes. ISO/IEC 17025 accredited calibration available.
Overview
Ralston block and bleed valves let you keep a calibration system pressurized with fluid or gas while venting pressure from the device being calibrated.
- Brass models (BLB0): max 3,000 psi / 200 bar / 20 MPa
- Stainless models (BLS0): max 5,000 psi / 350 bar / 35 MPa
- Quick-test × Quick-test or female NPT × female NPT ends
- Made in USA
Part of the Ralston Quick-test system of safe, stable, leak-free connections.
Shipping and tax are confirmed when we review your order.
OEM family: Block and Bleed Valves (https://www.ralstoninst.com/block-and-bleed-valves).
Specifications
| Family | Block and Bleed Valves |
| Ends | Quick-test or female NPT |
| Max pressure | 3,000 psi (brass) / 5,000 psi (stainless) |
| Materials | Brass or stainless steel |
| Country of origin | USA |
Build your part number
Configure your QTHA-BLB
Pick your options and we'll build the exact part number with a list-price estimate.
Select a model to build your part number.
Choose ends and material. Brass models are rated to 3,000 psi; stainless to 5,000 psi. Keeps the calibration system pressurized while you vent the device under test. Shipping and tax are confirmed when we review your order.
Ordering information
7 ordering models available.
| Model | Description | List Price | |
|---|---|---|---|
| QTHA-BLB0-1F-1F | Block & bleed valve - 1/8" female NPT inlet x 1/8" female NPT outlet, brass | $211.78 | |
| QTHA-BLB0-2F-2F | Block & bleed valve - 1/4" female NPT inlet x 1/4" female NPT outlet, brass | $208.55 | |
| QTHA-BLB0-HC | Block & bleed valve - male Quick-test inlet x female Quick-test outlet, brass | $229.59 | |
| QTHA-BLB0-HH | Block & bleed valve - male Quick-test inlet x male Quick-test outlet, brass | $205.49 | |
| QTHA-BLS0-2F-2F | Block & bleed valve - 1/4" female NPT inlet x 1/4" female NPT outlet, S.S. | $318.38 | |
| QTHA-BLS0-HC | Block & bleed valve - male Quick-test inlet x female Quick-test outlet, S.S. | $318.62 | |
| QTHA-BLS0-HH | Block & bleed valve - male Quick-test inlet x male Quick-test outlet, S.S. | $313.08 |
Related products
Official compatibility and accessories for this model - not look-alike suggestions.
