Ring Plunger Set (Torpedo / Non-Return Valve)
Ring Plunger Set (Torpedo / Non-Return Valve)
Product Overview
Best Ring Plunger Sets in India manufactured by Rajlaxmi Industries for injection moulding machines. Includes Check Ring, Torpedo, and Seat.
Rajlaxmi Industries is the leading manufacturer and supplier of high precision Ring Plunger Sets (also recognized as Torpedo Sets or Non-Return Valve (NRV) assemblies) in Ahmedabad, Gujarat, India. Our ring plunger sets are precision-crafted to ensure a positive dynamic seal during the injection forward stroke, completely eliminating molten plastic backflow, preventing shot weight inconsistencies, and providing exceptional operational longevity under high injection pressure.
Material Grades
EN-41B Nitro Alloy Steel, H13 Tool Steel, D2, Bimetallic Stellite Inlay
Hardness Rating
Gas Nitrided 65 - 70 HRC (950 - 1050 HV) / Vacuum Hardened 58 - 62 HRC
Key Technical Advantages
- Positive dynamic sealing prevents polymer backflow
- Consistent shot-to-shot weight and minimal component rejection
- Wear-resistant alloy compositions for filled and engineering resins
- Precision ground surface finish reducing friction and barrel scouring
- Direct OEM replacement for Windsor, Ferromatik Milacron, Haitian, Toshiba, Electronica, L&T
Technical Specifications Table
| Diameter Range | Ø 18 mm to Ø 250 mm (Custom dimensions up to 350 mm) |
|---|---|
| Primary Metallurgy | EN-41B Nitro Alloy Steel, H13 Tool Steel, D2, Bimetallic Stellite Inlay |
| Surface Hardness | Gas Nitrided 65 - 70 HRC (950 - 1050 HV) / Vacuum Hardened 58 - 62 HRC |
| Component Assembly | Torpedo (Tip), Check Ring (Slider), Seat (Rear Washer), Push Rod |
| Clearance Tolerance | 0.02 mm to 0.04 mm precision machined |
| Operating Pressure | Up to 2,500 bar injection pressure |
| Applicable Resins | PP, PE, ABS, PC, Nylon (PA6/PA66), PBT, POM, Acrylic, PET |
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