NRS Metal Seated Gate Valve (HW)

نوع الصمام

Non-Rising Stem Gate Valve (Inside Screw)

Stem does not rise; ideal for limited space

مادة الجسم

Cast Iron (ASTM A126 Class B / EN-GJL-250)

Seat Material

Bronze (Integral or renewable)

Bronze-to-bronze sealing

Stem Material

Brass (C36000 / C37700)

Corrosion resistant

End Connection

مترابطة (Female NPT per ASME B1.20.1)

عملية

Handwheel

Malleable iron / Ductile iron handwheel

Design Standard

MSS SP-70 / MSS SP-80 (Bronze trim) / ASME B16.34 (mod)

وجهًا لوجه

Manufacturer standard per MSS SP-70 (Threaded ends)

Inspection & Test

API 598 / MSS SP-70

تصنيف الضغط

Class 125 / Class 150 (Optional)

PN10 / PN16 available

Size Range

½” – 4″ (DN15 – DN100)

نطاق درجة الحرارة

-20°C to +150°C (Limitation of brass stem and bronze seats)

Stem Type

Non-rising stem (Inside screw)

Wedge Type

Solid wedge / Double disc (Optional)

Non-Rising Stem

Stem rotates but does not move linearly; threads inside valve

Suitable for tight spaces, buried service

Handwheel Operation

Sturdy handwheel for manual operation

Easy to operate, torque multiplication

Bronze Seated

Seat rings and wedge faces are bronze

Excellent corrosion resistance, long life, smooth operation

Full Port Design

Straight-through full bore

Low pressure drop, allows pigging

Inside Screw

Stem threads are inside the valve, protected from environment

Longer stem life, no external threads to corrode

Renewable Seat Rings

Seat rings can be replaced (optional)

Extended valve life

Cast Iron Body

Robust, cost-effective

Suitable for water and non-corrosive services

1

جسم

Cast Iron (ASTM A126 Class B)

2

Bonnet

Cast Iron (ASTM A126 Class B)

3

Wedge / Gate

Bronze (ASTM B62 / B584)

Solid wedge, bronze faces

4

Seat Ring (Body)

Bronze (ASTM B62)

Thread-in or pressed-in

5

ينبع

Brass (C36000 / C37700)

Non-rising stem

6

Stem Nut / Thrust Washer

Bronze / Brass

7

Packing

Graphite / PTFE

8

Gland / Gland Follower

Cast Iron / Brass

9

Bonnet Gasket

Compressed Fiber / Graphite

10

Bonnet Bolts / Studs

Steel (Zinc Plated) / Stainless Steel

11

Handwheel

Malleable Iron / Ductile Iron

12

Handwheel Nut

Steel / Brass

13

Nameplate

Stainless Steel / Aluminum

Medium

Water, Oil, Gas, Air, Steam, Non-corrosive Fluids

Operating Temperature

-20°C to +150°C (Brass stem limit)

Max Working Pressure

Class 125: 200 psi @ 100°F / 13.8 bar @ 38°C (Derate at higher temps)

Seat Material

Bronze-to-Bronze

Sealing Performance

API 598: Liquid – No visible leakage; Air – Class B permissible

Flow Direction

Bidirectional

Flow Characteristic

On-Off (Not for throttling)

نوع التجويف

Full Bore (Standard)

Stem Design

Inside Screw, Non-Rising

Handwheel Rotation

Clockwise to Close

Installation Position

Any position

Class 125

400 psi (2.8 MPa)

200 psi (1.4 MPa)

50-80 psi (0.34-0.55 MPa)

الصف 150

425 psi (2.9 MPa)

315 psi (2.2 MPa)

50-80 psi (0.34-0.55 MPa)

*(Note: Tests performed per API 598 / MSS SP-70)*

½”

15

79

110

80

1.5

¾”

20

92

120

80

2.0

1″

25

111

135

100

2.8

1¼”

32

120

150

100

3.6

1½”

40

152

170

125

5.0

2″

50

172

195

125

7.0

2½”

65

195

225

160

11.0

3″

80

210

255

160

15.5

4″

100

254

300

200

23.5

(Note: Dimensions are for reference only. Refer to certified GA drawing for exact dimensions.)