DN100-PN16-RF Diaphragm Pneumatic Actuated Control Valve
Description
Technical Data Sheet – Diaphragm Pneumatic Actuated Control Valve
(WCB Body with Fluoroplastic Lining, Standard Stem, with Positioner – DN100)
| Parameter | Specification |
|---|---|
| Product Name | Diaphragm Pneumatic Actuated Control Valve |
| Valve Type / Model | DN100-PN16-RF (Diaphragm type, lined) |
| Nominal Diameter (DN) | 100 mm |
| Nominal Pressure (PN) | PN16 (1.6 MPa / 232 psi) |
| Connection Type | Flanged |
| Flange Face Type | RF (Raised Face) |
| 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
| Component | Material Configuration |
|---|---|
| Body Material | 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) |
| Stem | 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)
| Parameter | 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
| Parameter | 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)
| Parameter | Specification |
|---|---|
| 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
| Parameter | Value |
|---|---|
| Flow Characteristic | With positioner – Linear or Equal percentage selectable (default: linear) |
| Rangeability | 50 : 1 (with positioner) |
| Leakage Class | 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)
| Parameter | 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.
📌 Final Selection Checklist (DN100, WCB+Lining, Standard Stem, with Positioner)
| Item | Confirmation |
|---|---|
| ✅ Nominal diameter | DN100 |
| ✅ Body material | WCB with fluoroplastic lining |
| ✅ Lining type (to be confirmed) | FEP / PFA / PTFE |
| ✅ Stem type | Standard (no cooling fins) |
| ✅ Positioner | Included (4‑20 mA input) |
| ✅ Media temperature range | -29℃ ~ _____℃ (max. lining limit) |
| ✅ Service media (to be confirmed) | ___________ |
| ✅ Diaphragm material | PTFE / EPDM+PTFE laminated |
| ✅ Action mode (to be confirmed) | Air‑to‑open (FC) / Air‑to‑close (FO) |
| ✅ Vacuum service? | Yes / No (if yes, special design required) |
| ✅ Additional accessories | Solenoid valve / Limit switch / Handwheel |
Let me know if you need to specify a particular lining material (FEP, PFA, or PTFE), adjust the temperature range, or add anti-static features.
