Stainless Steel Needle Valve – Technical Data Sheet
Size: DN15 | Pressure: PN40 | Connection: NPT with Nipples
Item | Spécification |
Product Name | Needle Valve, Integral Bonnet, Non‑rotating Stem |
Taille nominale | DN15 (1/2″) |
Pression nominale | PN40 (4.0 MPa / 40 bar / 580 psi) |
Connection Type | Female NPT (both ends) c/w Nipples – two stainless steel male NPT nipples included (threaded both ends) |
Nipple Specification | 1/2″ NPT male × 1/2″ NPT male, length ~50–80 mm (as specified) |
Matériau du corps | Stainless Steel (SS304 / SS316) |
Stem Tip | Metal‑to‑metal (sharp needle) or soft tip (PTFE/PEEK) optional |
Packing | PTFE or Grafoil (graphite) |
Handle Type | Phenolic knob or metal T‑handle |
Plage de température | -29°C ~ +200°C (PTFE packing) / -29°C ~ +400°C (graphite packing) |
Applicable Media | Water, oil, gas, steam, chemicals, instrumentation fluids |
- Main Parts & Materials (All Stainless Steel)
Composant | Material (Standard) | Optional Material |
Corps | SS316 (forged) | SS304, Monel, Hastelloy |
Tige | SS316 (rolled threads) | SS316 with Stellite tip, Monel |
Stem Tip | Integral 316 (sharp angle) | PTFE, PEEK, Vespel |
Packing | PTFE (chest) | Flexible graphite, Grafoil |
Packing Nut | SS304 / SS316 | – |
Handle | Phenolic black knob | SS T‑handle, lockable handle |
Nipples (included) | SS316 seamless tube, NPT male both ends | SS304, length custom |
Gland / Bonnet | SS316 (integral or threaded) | – |
- Dimensions & Weight (Reference – Valve Body Only, without Nipples)
Dimension | mm (approx.) | inch (approx.) |
End Connection (valve) | 1/2″ NPT female | – |
Overall Length (valve body) | 65 – 80 | 2.56 – 3.15 |
Height (handle up) | ~110 – 130 | – |
Hex flats (body) | 22 mm (AF) | 7/8″ |
Panel mounting (optional) | 35 mm centre distance | – |
Weight (valve only) | ~0.3 – 0.5 kg | ~0.7 – 1.1 lbs |
Weight (with 2 nipples) | ~0.6 – 0.9 kg | – |
Note: Nipple length is typically 50 mm (2″) each unless specified otherwise.
- Design Features
- Non‑rotating Stem – Prevents galling and extends seat/packing life; stem moves axially without rotation.
- Metal‑to‑Metal Seating (Standard) – Sharp needle tip provides fine flow control and positive shut‑off (bubble‑tight).
- PTFE Packing – Low friction, good chemical resistance, suitable up to 200°C. Graphite packing available for high temperature.
- Integral Bonnet Construction – Reduces potential leak paths; robust for high‑pressure applications.
- Included Nipples – Valve is supplied with two stainless steel male NPT nipples for easy connection to piping or tubing.
- Fine Flow Regulation – Needle profile allows precise, repeatable flow adjustment from fully closed to fully open.
- Performance Characteristics
Paramètre | Value |
Cv (full open) | ~0.8 – 1.2 (depending on orifice) |
Orifice diameter | 6 mm (typical for DN15 needle valve) |
Maximum working pressure | 4.0 MPa (PN40) at ambient temperature |
Temperature derating | Reduce pressure by 1% per °C above 200°C (for PTFE packing) |
Leakage rate | Zero detectable leakage (metal seat) per API 598 |
- Applications
- Instrumentation panels (pressure gauges, transmitters, switches)
- Chemical injection lines
- Sample points
- Bleed and vent ports
- High‑pressure hydraulic and pneumatic systems
- Steam tracing lines (with graphite packing)
- Testing & Compliance
Test | Standard / Requirement |
Hydrostatic shell test | 1.5 × PN40 (6.0 MPa) – no leakage |
Seat test (high pressure) | 1.1 × PN40 (4.4 MPa) – zero leakage |
Low pressure seat test | 0.6 MPa – zero leakage (bubble‑tight) |
Material traceability | EN 10204 3.1 (optional) |
Marking | Body marked: DN15, PN40, SS, flow direction arrow (if applicable) |
- Nipples Specification (Included)
Paramètre | Value |
Thread type | NPT male (ASME B1.20.1) |
Taille | 1/2″ NPT both ends |
Matériel | SS316 seamless tube |
Length | 50 mm standard (custom available) |
Hex flat | 22 mm (AF) |
Wall thickness | Sch 40 or Sch 80 (as specified) |
Nipples are pre‑wrapped with PTFE tape or supplied without tape per customer request.
- Ordering Information
Please specify:
- Valve size: DN15 (1/2″)
- Pressure: PN40
- Connection: Female NPT + 2 matching male NPT nipples
- Body material: SS316 / SS304
- Stem tip: Metal / Soft (PTFE)
- Packing: PTFE / Graphite
- Handle: Knob / T‑handle
- Nipple length: ___ mm
- Special: Panel mounting, NACE MR0175, low‑emission packing, etc.
Notes:
- “c/w Nipples” means the valve is supplied complete with two nipples, ready for installation.
- For high‑temperature steam (>200°C), select graphite packing and metal stem tip.
- Needle valves are not intended for full on/off isolation in high‑cycle applications; they are designed for flow regulation and shut‑off.
- Confirm pressure‑temperature limits with the manufacturer for specific media.
GARANTIE :
SAVVY VALVES s'engage à fournir des produits d'une qualité exceptionnelle et un service après-vente sans souci. Nos vannes sont garanties pour une durée de vie minimale de 12 mois, période durant laquelle nous fournissons gratuitement toutes les pièces de rechange nécessaires et des instructions d'entretien détaillées. Pendant la période de garantie, en cas de dommage non causé par l'homme, nous remplaçons gratuitement les composants et fournissons une assistance technique professionnelle. Après l'expiration de la garantie, seuls les pièces de rechange sont à votre charge, tout en bénéficiant de services de maintenance à prix réduits. Notre objectif est d'aider nos clients à réduire leurs coûts d'exploitation et à optimiser leur production grâce à une qualité fiable et un service après-vente complet. Qu'il s'agisse de questions techniques ou de besoins de maintenance, notre équipe d'experts répondra rapidement pour garantir le fonctionnement optimal de votre système de vannes.