DIN Rubber Seated NRS Gate Valve（Key)
DIN Rubber Seated NRS Gate Valve（Key) - Image 2
DIN Rubber Seated NRS Gate Valve（Key) - Image 3
DIN Rubber Seated NRS Gate Valve（Key) - Image 4

DIN Rubber Seated NRS Gate Valve（Key)

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Description

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

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1. General Information

Item Standard Configuration User Specification / Remarks
Valve Type Non-Rising Stem (Dark Rod) Resilient Seated Gate Valve Wedge type, soft seal
Design Standard DIN 3352 Part 2 or Part 4
Face-to-Face DIN 3202 F5 (Short pattern) / F4 (Long pattern)
Flange Standard EN 1092-2 / DIN 2501 / DIN 2533 PN6 / PN10 / PN16 / PN25
Inspection & Test DIN 3230 / EN 12266-1
Pressure Rating PN10 / PN16 / PN25
Size Range DN40 – DN600 (1½” – 24″) Larger sizes available upon request
Temperature Range -10°C to +80°C (Standard EPDM) / Up to +120°C (Special compounds)
End Connection Flanged (Double flanged)
Operation Handwheel / Square nut / Bevel gear / Electric actuator
Application Water, Wastewater, Potable water, Irrigation, Fire protection

2. Design Features

Feature Description Benefit
Non-Rising Stem Design Stem thread is inside the valve body; stem does not rise when opening/closing Ideal for limited installation space, buried service
Fully Rubber Encapsulated Wedge Ductile iron wedge fully covered with EPDM/NBR rubber Excellent corrosion resistance, bubble-tight shut-off
Wedge-Type Design Wedge shape provides self-centering and tight sealing Reliable sealing even with debris or pipe misalignment
Full Bore / Straight Through No pockets or recesses for debris accumulation Low pressure drop, self-cleaning
Triple O-Ring Stem Sealing Multiple O-rings on stem Prevents external leakage, low operating torque
Blow-Out Proof Stem Stem retained by internal shoulder Enhanced safety under pressure
Epoxy Coating Internal and external fusion bonded epoxy coating Excellent corrosion protection, potable water approved
No Bolted Bonnet Exposed Bonnet bolts are recessed and sealed Prevents corrosion of bonnet fasteners

3. Bill of Materials (Main Components)

No. Part Name Standard Material Optional Material Remarks
1 Body Ductile Iron (GGG-50 / EN-GJS-500-7) Cast Iron (GG-25) Epoxy coated
2 Bonnet / Cover Ductile Iron (GGG-50) Cast Iron Epoxy coated
3 Wedge / Gate Ductile Iron + Fully EPDM/NBR Encapsulated Fully rubber coated
4 Stem Stainless Steel (AISI 420 / 2Cr13) AISI 304 / AISI 316 / Monel Blow-out proof
5 Stem Nut Brass / Bronze Ductile Iron + Bronze insert
6 Seal Ring (Bonnet) EPDM / NBR O-Ring Bonded / Loose type
7 Stem Seals O-Rings (EPDM / NBR / Viton) Triple sealing
8 Gland / Packing EPDM / NBR / PTFE
9 Thrust Washer PTFE / Bronze
10 Handwheel / Square Nut Ductile Iron / Malleable Iron Epoxy coated
11 Fasteners (Bonnet) Stainless Steel (A2 / A4) Recessed & sealed
12 Nameplate Stainless Steel / Aluminum

4. Technical Parameters & Performance

Item Specification
Medium Water, Potable Water, Wastewater, Seawater, Air, Mild Chemicals
Operating Temperature EPDM: -10°C to +80°C (Peak +120°C intermittent) / NBR (Buna-N): -10°C to +70°C / Viton: -20°C to +150°C
Max Operating Pressure PN10 (10 bar / 145 psi) / PN16 (16 bar / 232 psi) / PN25 (25 bar / 363 psi)
Seat Type Resilient Soft Seat – Fully encapsulated wedge
Sealing Performance Zero Leakage (Bubble tight) – EN 12266-1 Rate A
Flow Direction Bidirectional
Flow Characteristic On-Off (Not for throttling/regulation)
Wedge Type Solid wedge / Flexible wedge
Stem Type Non-rising stem (Inside screw)
Suitable for Isolation service, buried installation

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

Pressure Rating Shell Test (Hydrostatic) Seat Test (Hydrostatic) Low Pressure Seat Test (Pneumatic)
PN10 15 bar (1.5 MPa) 11 bar (1.1 MPa) 0.6 bar (60 kPa)
PN16 24 bar (2.4 MPa) 17.6 bar (1.76 MPa) 0.6 bar (60 kPa)
PN25 37.5 bar (3.75 MPa) 27.5 bar (2.75 MPa) 0.6 bar (60 kPa)
*(Note: Tests performed per EN 12266-1 / DIN 3230)*

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

DN (mm) NPS (in) L (Face-to-Face) mm H (Closed) mm (approx) Weight (kg) approx
40 1½” 140 160 6
50 2″ 150 175 8
65 2½” 170 195 11
80 3″ 180 215 14
100 4″ 190 250 20
125 5″ 200 285 28
150 6″ 210 315 38
200 8″ 230 380 60
250 10″ 250 450 90
300 12″ 270 525 125
350 14″ 290 580 160
400 16″ 310 640 210
450 18″ 330 700 260
500 20″ 350 760 320
600 24″ 390 880 450
*(Note: For F4 long pattern, add approximately 20-30mm to length. For exact dimensions, refer to certified GA drawing. Add actuator weight separately.)*

7. Special Requirements / Options

  • Pressure Rating: PN10 / PN16 / PN25

  • Face-to-Face: F4 (Long pattern) / F5 (Short pattern)

  • Seat Material: EPDM (Standard for water) / NBR (Buna-N) / Viton (FKM) / Silicone

  • Body Material: Ductile Iron GGG-50 (Standard) / Cast Iron GG-25 / WCB / Stainless Steel

  • Wedge Material: Ductile Iron + EPDM (Standard) / Ductile Iron + NBR / Stainless Steel

  • Stem Material: Stainless Steel 420 (Standard) / 304 / 316 / 17-4PH / Monel

  • Operation: 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)

  • Coating: 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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