Needle Valve -- High Pressure Instrument SS316
Technical Datasheet -- Precision Needle Valves for Instrument Isolation and Flow Control
Document No.SV-DATA-NLV-001
RevisionA
DateMay 2026
ManufacturerSupreme Valves India, Ahmedabad, Gujarat, India
High-pressure needle valves for instrument isolation, gauge root valves, process sampling systems, and hydraulic control circuits. Precision-machined tapered needle with Stellite-hardened tip provides fine flow control with high rangeability and bubble-tight metal-to-metal shutoff. Compact forged barstock body (SS316, carbon steel, Monel, or Titanium) with panel mount option. Multiple end connections: threaded NPT/BSP, socket weld, butt weld, tube compression, and flanged. API 602 / ASME B16.34 / NACE MR0175 compliant.
Technical Specifications
| Parameter | Specification |
|---|
| Product Type | Needle Valves |
| Category | Needle Valves |
| Size Range | 1/8" to 2" (DN6 to DN50) |
| Pressure Rating | Up to 10,000 psi (689 bar) -- standard: 6,000 psi (414 bar) |
| End Connections | Threaded NPT / BSP / metric (standard), Socket weld, Butt weld, Flanged RF (Class 150 / 300), Tube fittings (OD compression: 1/8" to 1/2" OD) |
| Body Material | ASTM A182 F316 (SS316 forged barstock) / ASTM A105 (carbon steel forged barstock) / ASTM B564 UNS N04400 (Monel) / ASTM B381 Gr. F2 (Titanium) |
| Needle / Stem Material | SS316 with Stellite 6 or chrome plating on tip / SS316 hardened tip |
| Seat Material | SS316 integral seat with Stellite 6 overlay / renewable SS316 + Stellite seat insert |
| Packing | PTFE V-ring (standard -29 to +200 deg C) / Graphite braided (high temp to +540 deg C) / PEEK (high temp +260 deg C) |
| Operation | Handwheel (standard) / Knurled thumbwheel (panel mount) / Pneumatic micro-actuator (automated) |
| Leakage Class | API 598 / EN 12266-1 Class A -- zero visible leakage (metal-to-metal precision ground seat) |
| Temperature Range | -29 deg C to +200 deg C (PTFE packing) -- up to +540 deg C (graphite packing, SS316 body) |
| Panel Mount | Round or square body design with panel mount nut and lock washer for instrument panel installation |
Materials of Construction
| Component | Material |
|---|
| Stainless Steel | ASTM A182 F316 (SS316) forged barstock body, needle, and seat (corrosive / standard instrument service) |
| Carbon Steel | ASTM A105 forged barstock body (standard industrial, non-corrosive) |
| Nickel Alloy | ASTM B564 UNS N04400 (Monel) body and needle (seawater / marine / reducing acid service) |
| Titanium | ASTM B381 Gr. F2 (Titanium) body and needle (chlorine / hypochlorite / oxidising acid service) |
Testing & Inspection
| Test | Requirement |
|---|
| Testing | Hydrostatic shell test 1.5 x WP per API 598 / EN 12266-1; Seat leakage test per API 598 / EN 12266-1; Functional test -- full stroke, torque; Material certificates per EN 10204 3.1 |
| Certification | ISO 9001:2015 QMS, EN 10204 3.1 material certificates, hydrostatic and seat test reports |
Applicable Standards
| Standard | Description |
|---|
| Design Standard | API 602 Compact Steel Gate/Globe/Check Valves, ASME B16.34, NACE MR0175 (on request for sour service) |
Notes
- Maximum operating pressure, end connection type, and body material must be specified by the purchaser.
- For oxygen service (> 21% O2), all components must be degreased and cleaned per ASTM G93 Level 300, and PTFE packing is required (no oil-based lubricants).
- For sour gas service (H2S > 50 ppm), NACE MR0175 compliant SS316L or duplex stainless steel body and needle are required.
- For high-cycle instrument isolation service (> 1,000 cycles/year), Stellite 6 needle tip is strongly recommended to prevent galling.
- All valves are manufactured by Supreme Valves India as per our standard specifications.
