DIN Rubber Seated NRS Gate Valve（Key)

Description

Technical Datasheet: German Standard Non-Rising Stem Resilient Seated Gate Valve

1. General Information

2. Design Features

3. Bill of Materials (Main Components)

4. Technical Parameters & Performance

5. Test Pressure (Reference: Per DIN 3230 / EN 12266-1)

6. Dimensions & Weight (Reference: DIN 3202 F5 Short Pattern / PN16)

7. Special Requirements / Options

• 圧力定格: PN10 / PN16 / PN25
• 対面： F4 (Long pattern) / F5 (Short pattern)
• Seat Material: EPDM (Standard for water) / NBR (Buna-N) / Viton (FKM) / Silicone
• 本体素材: Ductile Iron GGG-50 (Standard) / Cast Iron GG-25 / WCB / Stainless Steel
• Wedge Material: Ductile Iron + EPDM (Standard) / Ductile Iron + NBR / Stainless Steel
• ステム素材: Stainless Steel 420 (Standard) / 304 / 316 / 17-4PH / Monel
• 手術： Handwheel (Standard) / Square nut for buried service / Bevel gear / Electric actuator / Pneumatic actuator
• Stem Extension: Yes / No (For buried service)
• Position Indicator: Yes / No (For buried service)
• コーティング： Epoxy coating (Min. 250 microns) – Color: Blue RAL 5017  / RAL 5005 / Custom
• Potable Water Approval: WRAS / ACS / NSF 61 / KTW / DVGW
• Test Certificate: EN 10204 Type 2.2 / 3.1
• Special Cleaning: For potable water / Food grade

Design Notes:

• Non-Rising Stem (Dark Rod) Design: The stem rotates but does not move linearly. The threaded section is inside the valve body and protected from the environment. This design is ideal for installations with limited headroom and for buried service where a valve key (square nut) is used for operation.
• Resilient Seated / Soft Seal: The wedge is fully encapsulated with rubber (EPDM or NBR). When closed, the rubber compresses against the body seat, providing bubble-tight shut-off and accommodating minor pipe misalignment or debris.
• Full Bore: The straight-through full bore design offers minimal resistance to flow and allows for pigging and cleaning operations.
• Triple O-Ring Stem Sealing: Multiple O-rings on the stem ensure positive sealing against external leakage and reduce operating torque.

Material Notes:

• Ductile Iron GGG-50 (EN-GJS-500-7): High strength, excellent ductility and impact resistance. Standard material for European standard valves.
• EPDM (Ethylene Propylene Diene Monomer): Excellent resistance to hot water, steam, ozone, UV, and mild chemicals. Ideal for potable water and wastewater. Not suitable for oils or hydrocarbons.
• NBR (Nitrile / Buna-N): Good resistance to oils, fuels, and hydrocarbons. Suitable for oil-contaminated water.
• Stainless Steel Stem: Provides corrosion resistance and long service life.

Application Notes:

• Suitable for: Potable water distribution, wastewater treatment, irrigation, fire protection systems, industrial cooling water, and buried pipelines.
• Not suitable for: Throttling or regulating service (use butterfly or globe valve instead). For high-temperature steam or aggressive chemicals, consult manufacturer.
• Installation: Can be installed in any position. For buried installation, use square nut operation and stem extension if required.

Note: This datasheet is prepared for a German Standard (DIN) Non-Rising Stem Resilient Seated Gate Valve per DIN 3352 / DIN 3202 / EN 1092-2. Ensure selected materials, pressure rating, and seat elastomer are compatible with the specific service conditions (medium, temperature, pressure, and environmental requirements).

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