Description
The pressure relief valve Kracht SPV/SPVF is a direct spring sliding piston valve. It is intended for mounting in pipelines and is suitable to safeguard low-pressure hydraulic circuits. The pipe connection is to be affected either by SAE-mounting surfaces (3000 psi) or by With Worth pipe threads ”G“.
Notes:
- When using strongly aerated media, the valve should preferably be mounted vertically with the setscrew facing down.
- The tank connection T of the valve must not be exposed to pressure when subject to flow (Q > 0), as in this case the valve cannot be ventilated, possibly resulting in unwanted vibrations and noise. If this is unavoidable, the special solution (S33) provides an alternative.
Application:
Explosion protection – Field of application for the pressure relief valves. Kracht SPV, SPVF Pressure Relief Valves is used to secure low pressure hydraulic circuits with various flammable and non-flammable fluids.
They can be used:
- In Zone 2 (Gas-Ex, Category 3 G) in the explosion groups IIA, IIB and IIC
- In Zone 22 (Dust-Ex, Category 3D), in the explosion groups III A and III B at non-conductive dusts with a minimum ignition energy >1mJ
- In Zone 1 (Gas-Ex, Category 2 G) in explosion groups IIA, IIB and IIC
- In Zone 21 (Dust-Ex, Category 2D) in the explosion groups III A and III B at non-conductive dusts with a minimum ignition energy >1mJ
Specification:
| Product name / Nominal size | SPV = NG 10 SPVF = NG 20 … 80 |
| Construction | Slide valve / directly-operated (Poppet valve on request) |
| Mounting | Pipe connection / panel mounting |
| Pipe connection | Flange connection ISO 6162-1 (SAE J518) Pipe thread ISO 228-1 |
| Fitting position | any, pressure setting screw below preferred |
| Housing material | EN-GJL-300 (EN-GJS-400-15) |
| Type setting | Mechanical Set screw Knob |
| Accessories | Welding flange SAE (3000 psi) |
| Hydraulic fluids | Hydraulic oils acc. to DIN 51 524/25 |
Hydraulic Characteristics
| Nominal size | 10 | 20/25 | 32/40 | 50 | ||
| Max. flow rate Q | l/min | 40 | 90 | 450 | 550 | |
| Nom. working pressure | bar | 30 | 30 | 25 | 25 | |
| Setting range response pressure | pv min | bar | 00.05 | 00.05 | 00.05 | 00.05 |
| pv max | bar | 30 | 40 | 25 | 25 | |
| Media temperature | NBR | ?m = –20°C…90 °C (Design A + E) | ||||
| FKM | ?m = –15°C… 150 °C (Design C + K) | |||||
| Copper | ?m = — 20 °C… 220 °C (Design B + F) | |||||
| Soft iron | ?m = -40°C… 220 °C (Design D) | |||||
| Ambient temperature | ?u= – 20 °C…60 °C (NBR, copper, soft iron) | |||||
| ?u= — 15 °C…60 °C (FKM) | ||||||
Download Data Sheet: Pressure Relief Valves SPV, SPVF Series
Ref: Krachtcorp.com
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