WESIVO 521S High Pressure Test Pump
Hand-operated comparison test pump for pressure instrument calibration, with positive pressure up to 2,000 psi (140 bar), vacuum generation and 10 Pa adjustment resolution.

Hand-operated comparison test pump for pressure instrument calibration, with positive pressure up to 2,000 psi (140 bar), vacuum generation and 10 Pa adjustment resolution.
- Positive pressure range
- Up to 2,000 psi (140 bar)
- Adjustment resolution
- 10 Pa
- Pressure medium
- Air
- Vacuum range
- Up to 95% vacuum; depends on local atmospheric pressure
WESIVO 521S
Request a quoteAbout this product
HIGH-PRESSURE COMPARISON TEST PUMP The WESIVO 521S is a hand-operated pressure test pump for calibration of pressure gauges and other pressure instruments. The supplied product document states a range from 95% vacuum to 2,000 psi (140 bar) positive pressure. FINE PRESSURE ADJUSTMENT A long lever generates pressure and a screw press provides fine adjustment. The supplied document lists 10 Pa adjustment resolution and states that 2,000 psi can be generated in about 30 seconds. Actual results depend on the setup and operating conditions. Vacuum performance depends on local atmospheric pressure. CONNECTORS AND CONFIGURATION The supplied document describes hand-tight quick connectors and lists 1/4 NPT, 1/2 NPT, 1/4 BSP, 1/2 BSP and M20 × 1.5 female port options. Confirm the required connection and configuration before ordering. REQUEST SELECTION SUPPORT Send the reference gauge, test instrument, target pressure points, connection type, quantity and delivery country. Use the supplied original PDF for the full source information and confirm the final configuration with WESIVO.
Technical information
| Positive pressure range | Up to 2,000 psi (140 bar) |
|---|---|
| Vacuum range | Up to 95% vacuum; depends on local atmospheric pressure |
| Pressure medium | Air |
| Adjustment resolution | 10 Pa |
| Pressure generation time | About 30 seconds to 2,000 psi, as stated in the supplied document |
| Piston volume | 60 ml |
| Pressure port options | 1/4 NPT, 1/2 NPT, 1/4 BSP, 1/2 BSP or M20 × 1.5 female |
| Dimensions | 540 × 270 × 178 mm |
| Approximate weight | 6.5 kg |
| Body materials | Stainless steel and aluminum, as listed in the supplied document |
| Seal materials | Buna-N, PTFE and copper alloy, as listed in the supplied document |
Downloads & files
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Send the full model or order code, quantity and delivery country. For a replacement, include the existing instrument specifications; for a new installation, use the selection checklist below.
Where can I find technical documents?
Published files are listed in Downloads & files. Check that the document covers your selected configuration. Request any additional drawing or manual with your inquiry.
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