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Primary Process Isolation Needle Valve for Instruments and Gauges
This datasheet covers instrument root needle valves in SS316 barstock for primary isolation of pressure gauges, transmitters, analysers, and sample points in process piping.
| Parameter | Specification |
|---|---|
| Size Range | 1/4" to 1" NPT or tube OD 6 mm to 25 mm |
| Pressure Rating | 6,000 PSI (standard), 10,000 PSI (high-pressure option) |
| Body Material | Solid SS316 barstock, one-piece machined |
| Valve Type | Needle valve, non-rotating tip |
| Needle Tip | SS316 hardened Vee-point, non-rotating |
| Seat Material | Integral SS316, matched-lapped |
| Temperature Range | -73°C to +538°C (graphite packing) |
| Connections | NPT male/female, BSPT, socket weld, tube compression |
| Bonnet | Threaded or union bonnet for in-line packing service |
| Handle | SS304 knurled handwheel standard; T-bar optional |
| Features | Non-rotating tip, blow-out proof stem, bonnet locking, panel mountable |
| Component | Material |
|---|---|
| Body | SS316 solid barstock, 100% volumetric ultrasonic tested, machined seat bore |
| Needle | SS316 hardened to 35 HRC, non-rotating Vee-point tip, matched-lapped to seat |
| Stem | SS316 anti-blow-out stem with ACME threads and retention collar |
| Packing | PTFE V-rings (standard) or graphite braided (high temperature) |
| Gland Nut | SS316 hex gland nut with smooth ACME threads to prevent galling |
| Bonnet | SS316 threaded or union bonnet for in-line packing replacement without removal from piping |
| Handle | SS304 knurled handwheel standard; aluminium T-bar for high-torque service |
| Test | Requirement |
|---|---|
| Test Standard | Hydrostatic 1.5x rated pressure per API 598 / MSS SP-99 |
| Certification | CE, ISO 9001, NACE MR0175 on request |
| Standard | Description |
|---|---|
| Design Standard | ASME B16.34 / MSS SP-99 |