Technical Data Sheet – Diaphragm Pneumatic Actuated Control Valve
(WCB Body with Fluoroplastic Lining, Standard Stem, with Positioner – DN100)
Paramètre | Spécification |
Product Name | Diaphragm Pneumatic Actuated Control Valve |
Valve Type / Model | DN100-PN16-RF (Diaphragm type, lined) |
Diamètre nominal (DN) | 100 mm |
Nominal Pressure (PN) | PN16 (1.6 MPa / 232 psi) |
Connection Type | Flanged |
Flange Face Type | RF (visage surélevé) |
Applicable Flange Standard | GB/T 9119 / HG/T 20592 / ASME B16.5 (or as specified) |
Lining Material | FEP / PFA / PTFE (fluoroplastic lining) – selected based on media & temperature |
Body & Diaphragm Materials
Composant | Material Configuration |
Matériau du corps | WCB (ASTM A216 Grade WCB) Carbon Steel Casting |
Body Lining | FEP, PFA, or PTFE lining (full lining, including wetted surfaces) |
Diaphragm Material | PTFE or EPDM+PTFE laminated (for corrosion resistance & flexibility) |
Bonnet / Yoke | WCB Cast Steel (with protective coating) |
Tige | Standard stem (no cooling fins) |
Lining Details: The valve body is fully lined with a fluoroplastic material (FEP, PFA, or PTFE) to provide exceptional corrosion resistance against strong acids, alkalis, and aggressive chemicals. The diaphragm is also PTFE or PTFE-faced to match the lining.
Lining Material Data (FEP / PFA / PTFE)
Property | FEP | PFA | PTFE |
Continuous service temperature | -29℃ ~ +150℃ | -29℃ ~ +180℃ | -29℃ ~ +200℃ |
Peak temperature (short term) | +175℃ | +200℃ | +230℃ |
Chemical resistance | Excellent (most acids, alkalis, solvents) | Excellent (similar to PTFE) | Excellent (universal) |
Permeation resistance | Good | Better than PTFE | Moderate (higher permeation) |
Wear resistance | Moderate | Good | Moderate |
Typical applications | Strong acids, alkalis, organic solvents | High-purity chemicals, aggressive media | Severe corrosive service |
Important: The overall temperature rating of the lined valve is limited by the lining material. Do not exceed the lining’s continuous service temperature.
WCB Body Material Data (for reference – structural only, wetted parts are lined)
Paramètre | Value |
Standard | ASTM A216 / ASME SA-216 |
Material Type | Carbon steel casting |
Chemical Composition | C ≤ 0.30%, Mn ≤ 1.00%, Si ≤ 0.60%, S ≤ 0.045%, P ≤ 0.04% |
Tensile Strength | 485 ~ 655 MPa (70 ~ 95 ksi) |
Yield Strength | ≥ 250 MPa (36 ksi) |
Elongation | ≥ 22% |
Note: The WCB body provides mechanical strength; the fluoroplastic lining provides chemical resistance. The media does not contact the WCB material.
Media Compatibility – Lined Valve (FEP/PFA/PTFE)
Media Type | Suitability |
Strong acids (HCl, H₂SO₄, HNO₃, HF*) | Excellent (*HF requires special grade PTFE) |
Strong bases (NaOH, KOH) | Excellent |
Organic solvents (acetone, toluene, MEK, etc.) | Excellent |
Chlorinated solvents | Excellent |
Oxidizing agents (chlorine, hypochlorite) | Good (FEP/PFA preferred) |
Hydrofluoric acid (concentrated) | Use PTFE lining with caution – confirm with supplier |
Molten alkali metals | Not allowed |
High-temperature fluorine gas | Not allowed |
Water, oil, air (non-corrosive) | Suitable (but lining is unnecessary) |
Actuator & Positioner Specifications
Paramètre | Value |
Actuator Type | Multi‑spring pneumatic diaphragm actuator |
Diaphragm Effective Area | Approx. 600 cm² (for DN100 stroke & force requirement) |
Air Supply Pressure Range | 0.3 ~ 0.7 MPa (recommended 0.4 ~ 0.6 MPa) |
Stroke | 25 ~ 40 mm |
Action Mode | Air‑to‑open (FC – fails closed) or Air‑to‑close (FO – fails open) optional |
Spring Range | 0.02 ~ 0.10 MPa (standard); custom available |
Air Connection | G1/4″ or NPT1/4″ |
Actuator Diaphragm Material | NBR + PET reinforced nylon |
Positioner | Included – Electro‑pneumatic positioner (4‑20 mA input) |
Positioner Details (Typical)
Paramètre | Spécification |
Input Signal | 4 ~ 20 mA DC (standard) |
Supply Pressure | 0.14 ~ 0.7 MPa |
Air Consumption | ≤ 0.5 L/min (steady state) |
Output Pressure Range | 0 ~ 0.7 MPa |
Linearity | ≤ ±1% |
Hysteresis | ≤ 0.6% |
Repeatability | ≤ 0.5% |
Enclosure Protection | IP66 (typical) |
Performance Data
Paramètre | Value |
Flow Characteristic | With positioner – Linear or Equal percentage selectable (default: linear) |
Rangeability | 50 : 1 (with positioner) |
Classe de fuite | Bubble‑tight seal, meets ANSI/FCI 70‑2 Class VI (zero leakage) |
Shut‑off Differential Pressure | Max. allowable ≥ 1.0 MPa (depends on lining & actuator) |
Rated Cv Value | Approx. 160 ~ 200 (water, full open, lined body reduces Cv slightly) |
Media Temperature Range | -29℃ ~ +180℃ (depending on lining material – see lining table) |
Standard Accessories (Included)
Accessory | Function |
Electro‑pneumatic positioner | 4‑20 mA signal control, precise proportional regulation |
Filter regulator | Cleans and stabilizes air supply (typically included with positioner package) |
Optional Accessories (Available on Request)
Accessory | Function |
Solenoid valve | Remote on/off control of air circuit |
Limit switch box | Provides open/closed position feedback |
Air lock valve | Maintains last position upon air failure |
Manual handwheel | Local manual operation |
Positioner feedback module | 4‑20 mA position feedback signal |
Dimensions & Weight (reference)
Paramètre | Value |
Face‑to‑face length (L) | Approx. 350 mm (GB/T 12221 series 1, PN16 DN100) |
Overall height (H) | Approx. 650 ~ 750 mm (depends on actuator & positioner) |
Actuator outer diameter | Approx. 280 ~ 320 mm |
Reference weight | Body ~50 kg (with lining) + Actuator ~18 kg + Positioner ~2 kg |
Typical Applications & Media Recommendations
Media Type | Recommended Configuration |
Strong acids (HCl, H₂SO₄, HNO₃) | WCB + FEP/PTFE lining + PTFE diaphragm + positioner |
Strong bases (NaOH, KOH) | WCB + FEP lining + PTFE diaphragm + positioner |
Organic solvents | WCB + PFA/PTFE lining + PTFE diaphragm |
Oxidizing agents (chlorine, bleach) | WCB + FEP lining + PTFE diaphragm |
High-purity chemicals | WCB + PFA lining (low extractables) |
Hydrofluoric acid (≤50%, ≤150℃) | WCB + special PTFE lining (consult supplier) |
Corrosive slurries | Not recommended – abrasion damages lining |
Applicable Standards
Standard | Content |
Design & manufacture | GB/T 12239 / ISO 16138 (diaphragm valve standard) |
Lining standard | GB/T 26500 / ASTM F1545 (fluoroplastic lining) |
Flange dimensions | GB/T 9119 / HG/T 20592 / ASME B16.34 |
Body material | ASTM A216 Grade WCB |
Pressure testing | GB/T 13927 / API 598 |
Leakage class | ANSI/FCI 70‑2 Class VI |
Positioner standard | IEC 60534 |
Critical Notes for Lined Valves
- Corrosion resistance – The fluoroplastic lining (FEP/PFA/PTFE) provides excellent resistance to almost all chemicals except molten alkali metals and some fluorine compounds at high temperatures. Always verify compatibility with your specific media.
- Temperature limitation – The valve’s maximum operating temperature is limited by the lining material. Do not exceed +180℃ for FEP, +200℃ for PTFE/PFA. For higher temperatures, a lined valve is not suitable.
- No cooling fins on stem – This valve has a standard stem. For lined valves, high stem temperatures are less critical because the lining isolates the media, but ensure the diaphragm and packing are compatible with the process temperature.
- Avoid vacuum service – Fluoroplastic linings can collapse under vacuum (especially at elevated temperatures). For vacuum applications, a special vacuum-resistant lining design is required. Consult the supplier.
- Abrasive media – Lined valves are not recommended for abrasive slurries (e.g., with sand, crystals) as they can wear through the soft lining.
- Electrostatic discharge – For flammable media, ensure the valve has anti-static design (conductive PTFE lining or grounding device).
- Installation – Use gaskets suitable for lined flanges (full-face gaskets recommended). Do not overtighten bolts to avoid damaging the lining.
- Positioner is included – Enables precise modulating control. Default flow characteristic is linear. Equal percentage available upon request.
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.
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