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Neles Series VD Pneumatic Diaphragm Actuator
Brand: ValmetMetso's Neles series VD Actuators are exclusively developed for linear valves.
They provide safe and reliable operation and are well suited for many different kind of applications.
The high performance internal coating resists wear and corrosion and the replaceable inner parts guarantee a long life cycle.
The VDD/VDR series diaphragm actuator is well suited for most of the control applications.
Direction
Actuator Size
Spring Range
Stroke
Case Material
Diaphragm Material
Seal Material
Bolt Material
Position Limitation
External Override
Connection Size & Actuator Size
Options
Model
View Details
Part Number / SKU
VDD25E020AEAKXXAXR
Specifications
Brand
Accuracy
- Stroking Time: ± 10 %
Actuator Type
- Direct-Acting
- Handwheel
- Pneumatic
- Reverse Acting
- Rolling Diaphragm
- Spring Diaphragm
Bearing Material
- DU Dry: AISI 304 Stainless Steel - VD 25/29/37 (with Hand Wheel)
- DU Dry: Phosphor Bronze - VD 25/29/37 (with Hand Wheel)
- DU Dry: PTFE - VD 25/29/37 (with Hand Wheel)
Bushing Material
- Handle Guide: Brass - VD Diaphragm Actuator
Cap Material
- Vent: Stainless Steel - VD (without Hand Wheel)
Cover Material
- Hand Wheel: Steel - VD Diaphragm Actuator
Diameter
- Actuator Stem: 0.95" to 1.38" (24 to 35 mm)
Diaphragm Material
- EPDM
- Nylon
- Silicone
- Steel
Flange Material
- Bearing: AISI 304 Stainless Steel - VD 25/29/37 (with Hand Wheel)
- Shaft: Steel (JIS G4051-S45C) - VD 25/29/37 (with Hand Wheel)
Handle Assembly Material
- Handle Base: Carbon Steel (ASTM A216 Grade WCB) - VD 25/29/37 (with Hand Wheel)
- Handle Base: Steel (JIS G3101-SS400) - VD Diaphragm Actuator
- Handle: Aluminum Alloy (ASTM B209 Alloy 6061 T6) - VD 25/29/37 (with Hand Wheel)
- Locking Handle: 304 Stainless Steel - VD 25/29/37 (with Hand Wheel)
Materials of Construction
- Gear Box: Ductile Iron - VD Diaphragm Actuator
- Gear Box: PMMA - VD Diaphragm Actuator
- Handle Indicator, Handle Wheel Indicator: Aluminum - VD 25/29/37 (with Hand Wheel), VD Diaphragm Actuator
- Lever Arm: Cast Stainless Steel (ASTM A747 Grade CB7Cu-1) - VD 25/29/37 (with Hand Wheel)
- Lower Case, Diaphragm Plate, Screw Guide Plate: Steel (JIS G3101 SS400) - VD (without Hand Wheel), VD Diaphragm Actuator
- Silencer, Spring Washer: Stainless Steel - VD (without Hand Wheel), VD Diaphragm Actuator
- Split Pin: Zinc - VD 25/29/37 (with Hand Wheel)
- Stem Guide: Aluminum Alloy (ASTM B209 Alloy 6061 T6) - VD (without Hand Wheel)
- Washer, Rivet, Indicator, Lock Washer, Spring Washer, Shaft Pin, Shaft Guide, Indicator Plate: AISI 304 Stainless Steel - VD (without Hand Wheel), VD 25/29/37 (with Hand Wheel), VD Diaphragm Actuator
- Washer: Bronze - VD (without Hand Wheel), VD Diaphragm Actuator
- Yoke [VD (without Hand Wheel)], Split Pin [VD 25/29/37 (with Hand Wheel)]: Carbon Steel (ASTM A216 Grade WCB)
Name Plate, Tag Material
- AISI 304 Stainless Steel - VD (without Hand Wheel)
NPT Connection
- 1/2" NPT
- 1/4" NPT
- 3/8" NPT
Nut & Bolt Material
- Hexagon, Bolt: Stainless Steel (ISO 3506 A2-70) - VD (without Hand Wheel), VD Diaphragm Actuator
- Hexagon: Molybdenum Disulfide (MoS2) - VD (without Hand Wheel)
- Lifting Eye Nut, Stem Nut: AISI 304 Stainless Steel - VD (without Hand Wheel)
O-Ring Material
- NBR - VD (without Hand Wheel), VD Diaphragm Actuator
- Nitrile - VD (without Hand Wheel), VD Diaphragm Actuator
Packing Material
- U-Packing: NBR - VD (without Hand Wheel), VD Diaphragm Actuator
- U-Packing: Nitrile - VD (without Hand Wheel), VD Diaphragm Actuator
Pressure Range
- psi: 60 (kPa: 420, bar: 4.2) - Max.
Response Time
- Stroking (Case-1 Load): 2 to 14 seconds
- Stroking (Case-1 Vent, Case-2 Vent): 3 to 18 seconds
- Stroking (Case-2 Load): 2 to 17 seconds
Ring Material
- Snap: AISI 304 Stainless Steel - VD 25/29/37 (with Hand Wheel)
Screw Material
- Hexagon, Bearing Flange: Stainless Steel (ISO 3506 A2-70) - VD (without Hand Wheel), VD 25/29/37 (with Hand Wheel), VD Diaphragm Actuator
- Hexagon: Molybdenum Disulfide (MoS2) - VD (without Hand Wheel)
- Round Head, Hand Wheel, Shaft Flange: AISI 304 Stainless Steel - VD (without Hand Wheel), VD 25/29/37 (with Hand Wheel), VD Diaphragm Actuator
Seat / Seal Material
- Seal: NBR
- Seal: Nitrile Rubber
- Seal: Silicone
- Spring Seat: Zinc Steel (JIS G3101 SS400) - VD (without Hand Wheel)
Shaft Material
- Handle: Steel (JIS G4051-S45C) - VD 25/29/37 (with Hand Wheel)
- Lever Arm: AISI 304 Stainless Steel - VD 25/29/37 (with Hand Wheel)
Spring Material
- Stainless Steel (JIS G3560 SWOSC-B) - VD (without Hand Wheel)
Spring Range
- psi: 11 to 48 (kPa: 80 to 340, bar: 0.8 to 3.4)
Stem Material
- Hand Wheel: Steel (JIS G3101-SS400) - VD Diaphragm Actuator
- Hand Wheel: Zinc (Zn) - VD Diaphragm Actuator
- Top: AISI 304 Stainless Steel (High Consistency Rubber) - VD (without Hand Wheel)
Supply Pressure - Maximum
- psi: 60 (kPa: 420, bar: 4.2)
Temperature Range
- -20° to 85° C (-4° to 185° F)
- -40° to 70° C (-40° to 160° F) - Low Temperature VD
- -53° to 70° C (-63° to 158° F) - Arctic VD Model
