Application
Nahrab Gostar spring-loaded check valves provide fast, reliable non-return protection for pump discharge and suction systems. Their short-body design reduces installation space, opens with low head loss, and closes rapidly to limit reverse flow and water hammer.
Product Features and Advantages:
- Rapid disc closure to reduce reverse flow and water hammer.
- Closing speed can be adjusted by changing spring force without adding external counterweights.
- No exposed counterweight mechanism.
- Suitable for multiple installation orientations without structural modification.
- Short-body design permits a butterfly valve to be installed immediately downstream.
- Easy replacement, repair, and maintenance.
- Durable spring, shaft, and bearing materials support long service life.
- Flange drilling in accordance with EN 1092-1 (DIN 2501 / ISO 7005-1).
- Face-to-face dimensions in accordance with DIN 3202-F15.
- Final hydrostatic testing in accordance with DIN EN 12266-1 and ISO 5208.
Corrosion Protection :
Electrostatic epoxy powder coating with a minimum dry-film thickness of 250 μm, suitable for potable-water applications.

Spare Parts | Material | Part Name | Part No. |
| | Ductile iron (GJS 400-15) | Body | 1 |
| | Ductile iron (GJS 400-15) | Disk | 2 |
| | Ductile iron (GJS 400-15) | Disk Retaining Ring | 3 |
| | Stainless steel (1.4021) | Shaft | 4 |
| | Stainless steel ( 1.4301) | Seat | 5 |
• | Stainless steel (1.4310) | Spring | 6 |
• | EPDM or NBR | Sealing | 7 |
| | Bronze | Bushing | 8 |
| | Stainless steel A2 | Nuts & Bolts | 9 |
Spring-loaded check valves can be manufactured entirely from stainless steel on request.
The English catalog for this product will be published here when available.
Technical drawings for this valve will be uploaded soon.