JIS Marine Angle SDNR Valve
JIS Marine Angle SDNR Valve (JIS Angle Screw Down Non Return Valve) is a marine valve designed according to Japanese Industrial Standards for ship piping systems.
The valve combines the functions of a shut-off valve and a non-return valve, allowing manual flow control while automatically preventing reverse flow. Its angle pattern design provides efficient pipeline arrangement, reduced flow resistance, and reliable operation in marine environments.
JIS Marine Angle SDNR Valve is widely installed in:
Ship seawater cooling systems
Fire fighting systems
Ballast systems
Bilge systems
Fuel oil systems
Boiler and auxiliary piping systems
Overview
Working Principle of JIS Marine Angle SDNR Valve
JIS Marine Angle SDNR Valve operates through a screw-down mechanism combined with a non-return function.
The valve controls flow through the movement of the disc:
The handwheel rotates the valve stem.
The stem moves the disc upward or downward.
When opened, the medium passes through the angled flow passage.
When closed, the disc contacts the seat to stop flow.
If reverse pressure occurs, the disc automatically closes to prevent backflow.
Main Components of JIS Marine Angle SDNR Valve
| Component | Function |
|---|---|
| Valve Body | Provides pressure resistance and angled flow channel |
| Bonnet | Seals the valve chamber and supports internal parts |
| Disc | Controls opening, closing, and non-return operation |
| Valve Seat | Provides sealing surface |
| Stem | Transfers operating movement to the disc |
| Handwheel | Manual operation mechanism |
| Yoke | Supports valve operating components |
| Packing | Prevents stem leakage |
| Gasket | Ensures bonnet sealing |
| Fasteners | Connect valve body components |
Applicable Standards of JIS Marine Angle SDNR Valve
| Standard Category | Applicable Standards |
|---|---|
| Marine Valve Standards | JIS F7400 Series, JIS F7409, JIS Marine Valve Standards |
| Valve Design Requirements | JIS B2001, ISO Valve Standards |
| Flange Standards | JIS B2220, JIS F7805 |
| Pressure Rating | JIS 5K, 10K, 16K, 20K |
| Material Standards | JIS Material Standards, ASTM Standards |
| Pressure Testing | JIS B2003, ISO 5208, API 598 |
| Marine Classification | ClassNK, ABS, DNV, LR, BV, CCS |
Technical Specifications of JIS Marine Angle SDNR Valve
| Item | Specification |
|---|---|
| Product Name | JIS Marine Angle SDNR Valve |
| Type | Angle Screw Down Non Return Valve |
| Standard | JIS Marine Valve Standard |
| Function | Shut-off and Non-Return |
| Medium | Seawater, Fresh Water, Oil, Air, Steam |
| Size Range | According to JIS Requirements |
| Pressure Rating | JIS 5K / 10K / 16K / 20K |
| Connection Type | JIS Flanged End |
| Flange Standard | JIS B2220 |
| Operation | Handwheel Manual Operation |
| Installation | Marine Piping Systems |
| Application | Shipbuilding and Offshore Systems |
Pressure Test of JIS Marine Angle SDNR Valve
| Test Item | Description |
|---|---|
| Shell Hydrostatic Test | Verify valve body pressure strength |
| Seat Leakage Test | Confirm shut-off sealing performance |
| Non-Return Function Test | Check automatic closing performance |
| Pressure Holding Test | Ensure pressure stability |
| Material Inspection | Verify material compliance |
| Final Inspection | Confirm product quality before delivery |
Typical Applications
| Application | Function |
|---|---|
| Seawater Cooling System | Controls cooling water flow |
| Fire Fighting System | Provides reliable isolation |
| Ballast System | Controls ballast water direction |
| Bilge System | Prevents reverse flow |
| Fuel Oil System | Controls fuel pipeline flow |
| Marine Auxiliary Systems | Provides safe fluid control |
Material Selection of JIS Marine Angle SDNR Valve
| Material | Features | Applications |
|---|---|---|
| Cast Iron | Economical and durable | General marine piping systems |
| Ductile Iron | Higher strength and impact resistance | Medium pressure systems |
| Bronze | Excellent seawater corrosion resistance | Marine seawater systems |
| Cast Steel | High strength and pressure capability | High pressure applications |
| Stainless Steel | Superior corrosion resistance | Offshore and harsh environments |
| Brass | Good corrosion resistance and machinability | Auxiliary systems |
Common Material Standards
| Material | Standard |
|---|---|
| Cast Iron | JIS FC Series / ASTM A126 |
| Ductile Iron | JIS FCD Series / ASTM A536 |
| Bronze | JIS BC6 / ASTM B62 |
| Carbon Steel | JIS SC / ASTM A216 WCB |
| Stainless Steel | JIS SUS304 / SUS316 |
Advantages of JIS Marine Angle SDNR Valve
| Feature | Benefit |
|---|---|
| JIS Standard Compliance | Compatible with Japanese marine piping systems |
| Angle Pattern Design | Saves installation space and reduces pressure loss |
| Combined Valve Function | Provides shut-off and check functions |
| Marine Grade Materials | Suitable for seawater environments |
| Reliable Sealing | Ensures safe vessel operation |
