Description
Technical Datasheet: Non-Rising Stem Gate Valve
(Cast Iron Body / Bronze Seated / Brass Stem / NPT Threaded / Square Head)
|
Item |
Standard Configuration |
User Specification / Remarks |
|
Valve Type |
Non-Rising Stem Gate Valve (Inside Screw) |
Stem does not rise; ideal for limited space |
|
Body Material |
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 |
Threaded (Female NPT per ASME B1.20.1) |
|
|
Operation |
Square Head (For wrench operation) |
No handwheel |
|
Design Standard |
MSS SP-70 / MSS SP-80 (Bronze trim) / ASME B16.34 (mod) |
|
|
Face-to-Face |
Manufacturer standard per MSS SP-70 (Threaded ends) |
|
|
Inspection & Test |
API 598 / MSS SP-70 |
|
|
Pressure Rating |
Class 125 / Class 150 (Optional) |
PN10 / PN16 available |
|
Size Range |
½” – 4″ (DN15 – DN100) |
|
|
Temperature Range |
-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) |
|
Feature |
Description |
Benefit |
|
Non-Rising Stem |
Stem rotates but does not move linearly; threads inside valve |
Suitable for tight spaces, buried service, and indicator not needed |
|
Square Head Operation |
Machined square on top of stem for wrench operation |
Simple, robust, no handwheel to break |
|
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 |
|
No. |
Part Name |
Material |
Remarks |
|
1 |
Body |
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 |
Stem |
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 |
Square Head / Operating Nut |
Cast Iron / Malleable Iron |
Square drive |
|
12 |
Nameplate |
Stainless Steel / Aluminum |
|
Item |
Specification |
|
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) |
|
Bore Type |
Full Bore (Standard) |
|
Stem Design |
Inside Screw, Non-Rising |
|
Installation Position |
Any position (but horizontal preferred for square head access) |
|
Pressure Rating |
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) |
|
Class 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)* |
|
NPS |
DN (mm) |
L (Face-to-Face) mm |
H (Closed) mm (approx) |
Square Head Size (in) |
Weight (kg) approx |
|
½” |
15 |
79 |
70 |
0.48 (12.2mm) |
1.2 |
|
¾” |
20 |
92 |
80 |
0.48 (12.2mm) |
1.6 |
|
1″ |
25 |
111 |
95 |
0.60 (15.2mm) |
2.3 |
|
1¼” |
32 |
120 |
105 |
0.60 (15.2mm) |
3.0 |
|
1½” |
40 |
152 |
120 |
0.75 (19.1mm) |
4.2 |
|
2″ |
50 |
172 |
140 |
0.75 (19.1mm) |
6.0 |
|
2½” |
65 |
195 |
165 |
0.88 (22.4mm) |
9.5 |
|
3″ |
80 |
210 |
185 |
0.88 (22.4mm) |
13.5 |
|
4″ |
100 |
254 |
225 |
1.00 (25.4mm) |
21.0 |
|
(Note: Dimensions are for reference only. Refer to certified GA drawing for exact dimensions.) |
Design Notes:
Application Notes:
Note: This datasheet is prepared for a Non-Rising Stem Gate Valve with cast iron body, bronze seats, brass stem, NPT ends, and square head operation per MSS SP-70 / API 598. Ensure selected materials, pressure rating, and trim are compatible with the specific service conditions.
GUATANTEE:
SAVVY VALVES is committed to delivering exceptional product quality and worry-free after-sales service. Our valves are guaranteed to provide a minimum service life of 12 months, during which we will supply all necessary spare parts and detailed maintenance instructions free of charge. Within the warranty period, if any non-human-induced damage occurs, we will replace components at no cost and provide professional technical support. After the warranty expires, customers only need to pay for the cost of spare parts, while still benefiting from discounted maintenance services. Our goal is to help clients reduce operational costs and enhance production efficiency through reliable quality and comprehensive after-sales support. Whether for technical inquiries or maintenance needs, our expert team will respond promptly to ensure your valve system maintains optimal performance at all times.
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