Beschrijving
Technical Datasheet: Non-Rising Stem Gate Valve
(Cast Iron Body / Bronze Seated / Brass Stem / NPT Threaded / Handwheel)
- General Information
|
Item
|
Standard Configuration
|
User Specification / Remarks
|
|
Kleptype
|
Non-Rising Stem Gate Valve (Inside Screw)
|
Stem does not rise; ideal for limited space
|
|
Lichaamsmateriaal
|
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
|
Met schroefdraad (Female NPT per ASME B1.20.1)
|
|
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Operatie
|
Handwheel
|
Malleable iron / Ductile iron handwheel
|
|
Design Standard
|
MSS SP-70 / MSS SP-80 (Bronze trim) / ASME B16.34 (mod)
|
|
|
Face-to-face
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Manufacturer standard per MSS SP-70 (Threaded ends)
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|
|
Inspection & Test
|
API 598 / MSS SP-70
|
|
|
Drukclassificatie
|
Class 125 / Class 150 (Optional)
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PN10 / PN16 available
|
|
Size Range
|
½” – 4″ (DN15 – DN100)
|
|
|
Temperature Range
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-20°C to +150°C (Limitation of brass stem and bronze seats)
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|
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Stem Type
|
Non-rising stem (Inside screw)
|
|
|
Wedge Type
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Solid wedge / Double disc (Optional)
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|
- Design Features
|
Feature
|
Beschrijving
|
Benefit
|
|
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
|
- Bill of Materials (Main Components)
|
No.
|
Part Name
|
Materiaal
|
Remarks
|
|
1
|
Lichaam
|
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
|
Stang
|
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
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Steel (Zinc Plated) / Stainless Steel
|
|
|
11
|
Handwheel
|
Malleable Iron / Ductile Iron
|
|
|
12
|
Handwheel Nut
|
Steel / Brass
|
|
|
13
|
Nameplate
|
Stainless Steel / Aluminum
|
|
- Technical Parameters & Performance
|
Item
|
Specificatie
|
|
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)
|
|
Boring type
|
Full Bore (Standard)
|
|
Stem Design
|
Inside Screw, Non-Rising
|
|
Handwheel Rotation
|
Clockwise to Close
|
|
Installation Position
|
Any position
|
- Test Pressure (Reference: Per API 598 / MSS SP-70)
|
Drukclassificatie
|
Shell Test (Hydrostatic)
|
Seat Test (Hydrostatic)
|
Low Pressure Seat Test (Pneumatic)
|
|
Class 125
|
400 psi (2.8 MPa)
|
200 psi (1.4 MPa)
|
50-80 psi (0.34-0.55 MPa)
|
|
Klas 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)*
|
|
|
|
- Dimensions & Weight (Reference: Threaded End NPT / MSS SP-70)
|
NPS
|
DN (mm)
|
L (Face-to-Face) mm
|
H (Closed) mm (approx)
|
Handwheel Diameter (mm)
|
Weight (kg) approx
|
|
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.)
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|
|
|
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- Special Requirements / Options
- Drukclassificatie: Class 125 / Class 150
- Verbinding beëindigen: NPT / BSP (Parallel or taper)
- Seat Type: Integral / Renewable bronze seat rings
- Wedge Material: Bronze (Standard) / Cast Iron with Bronze overlay / Stainless Steel
- Steelmateriaal: Brass (Standard) / Stainless Steel (304/316) / Bronze
- Motorkaptype: Screwed-in bonnet / Bolted bonnet
- Packing Material: Graphite / PTFE / Non-asbestos
- Handwheel: Malleable iron / Ductile iron / Cast iron
- Test Certificate: EN 10204 Type 2.2 / 3.1
- Special Cleaning: For potable water / Oxygen service
- NACE Compliance: MR0175 (Requires material upgrade)
- Accessoires: Locking device / Extension stem / Position indicator / Chainwheel
Design Notes:
- Non-Rising Stem (NRS) : The stem rotates within the valve; the gate travels along the stem threads. This design is ideal where vertical space is limited.
- Handwheel Operation: Provides mechanical advantage for easy operation. Standard rotation is clockwise to close.
- Bronze Trim: Provides excellent corrosion resistance and long-term reliable sealing. Bronze-on-bronze seats are standard for water and low-pressure steam services.
- Cast Iron Body: Suitable for non-shock applications; must be protected from rapid temperature changes and water hammer.
Application Notes:
- Suitable for: Water distribution, wastewater, irrigation, fire protection, HVAC, and general industrial services.
- Not suitable for: High-pressure steam, severe thermal cycling, or highly corrosive fluids (consult manufacturer for material upgrades).
- Installation: Can be installed in any position. For buried service, consider stem extension and position indicator.
Note: This datasheet is prepared for a Non-Rising Stem Gate Valve with cast iron body, bronze seats, brass stem, NPT ends, and handwheel operation per MSS SP-70 / API 598. Ensure selected materials, pressure rating, and trim are compatible with the specific service conditions.
GARANTIE:
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