Description
BRASS GATE VALVE TECHNICAL DATA SHEET
Design: Inside Screw • Bonnet: Threaded Connection
| Parameter |
Specification |
| Valve Type |
Inside Screw, Non-Rising Stem Gate Valve |
| Bonnet Connection |
Threaded (Screwed) • Tapered Thread (BSPT/NPT) |
| Size Range |
¼” to 2″ (DN8 to DN50) |
| Body/Bonnet Material |
59-1 Brass (CuZn40Pb2 • GB/T 5231) |
| Stem |
59-1 Brass • ACME Thread (Inside Body) • Square Head for Wrench |
| Disc |
Solid Brass Wedge (59-1) • Flexible Design |
| Seat |
Integral Body Seat (Machined Brass) |
| Seals |
EPDM Stem O-rings (Standard) • Optional: PTFE/VITON® |
| Packing |
Braided Graphite (ASTM F109) • 2-Stage (Primary O-ring + Secondary Packing) |
| End Connections |
Threaded: BSPT (ISO 228) / NPT (ASME B1.20.1) |
| Pressure Rating |
150 PSI @ 100°C • 20 bar @ 20°C (Max. Static Pressure) |
| Temperature Range |
-20°C to 120°C (EPDM) • -10°C to 150°C (PTFE) |
| Seat Leakage |
Class B (EN 12266-1) |
| Flow Direction |
Bi-directional |
| Port Type |
Full Bore (100%) |
| Operation |
Handwheel (Direct Mounted) • Stem Retained Inside Body |
| Standards |
ISO 228-1 • API 600 • ASME B16.34 |
| Hydro Test |
Body: 30 bar • Seat: 11 bar |
| Bonnet Seal |
EPDM Gasket + Thread Sealant (Leak-tight to 20 bar) |
| Max. Handwheel Torque |
½”: 12 Nm • 1″: 25 Nm • 2″: 50 Nm |
| Weight (Approx.) |
½”: 0.22 kg • 1″: 0.65 kg • 2″: 1.55 kg |
| Compliance |
RoHS • REACH • Lead Content: 0.8-1.9% (Not for potable water) |
| Applications |
Steam (<120°C) • Compressed Air • Fuel Oil • Non-corrosive Liquids |
⚙️ INSIDE SCREW DESIGN ADVANTAGES
| Feature |
Benefit |
| Stem Thread Location |
Threads remain inside valve body • Protected from external corrosion/dust |
| Stem Retention |
Stem cannot be blown out under pressure |
| Maintenance |
No external stem exposure • Reduced wear in dirty environments |
| Compactness |
Lower installation height vs. OS&Y designs |
