Description
1" PVC Solenoid Valve for Chemical Dosing – UDC25
The UDC25 is a 1" 2/2 way normally closed chemical-resistant solenoid valve designed for controlling strong acids, alkalis and corrosive process fluids compatible with PVC and PTFE.
Featuring a corrosion-resistant PVC valve body, PTFE sealing system and isolated dry-armature construction, the UDC25 helps protect the solenoid mechanism from aggressive process media. The manufacturer specifies the PVC UDC range for strong acid and strong alkali service, with PVC body corrosion resistance stated as pH 3–11.
The zero-pressure assisted-lift design operates from 0 Bar without requiring a minimum pressure differential. The UDC25 incorporates a 10mm orifice providing 58.3 L/min water flow at 1 Bar pressure drop, with an operating pressure range of 0 to 0.5 Bar.
Valve Function & Operation
Function: 2/2 way normally closed
Operation: Assisted lift
Design: Isolated dry armature
Normal Position: Closed when de-energised
Energised Position: Open
Minimum Differential Pressure: 0 Bar
The manufacturer identifies the UDC family as a normally closed, dry-armature assisted-lift design operating from zero differential pressure.
This allows the UDC25 to operate in low-pressure chemical systems where conventional pilot-operated valves requiring a minimum differential pressure may be unsuitable.
Ports & Connections
Port Size: 1" BSP
Optional Thread: NPT
The 1" connection provides straightforward installation into larger chemical dosing and process pipework while retaining the compact 10mm internal orifice of the UDC25.
Pressure & Performance
Operating Pressure: 0 to 0.5 Bar
Minimum Differential Pressure: 0 Bar
Orifice: 10mm
Water Flow: 58.3 L/min at 1 Bar pressure drop
Maximum Media Viscosity: 20 cSt
Vacuum: Not suitable
Construction & Materials
Body: PVC
Seals: PTFE
Diaphragm: NBR with PTFE coating
Solenoid Tube: Stainless steel
Armature: 430F stainless steel
Shading Ring: Copper
Coil Housing: Resin or metal
The PVC body is specified with corrosion resistance approximately pH 3–11. For more aggressive chemical applications, the PTFE-bodied UDC-TF range is specified for approximately pH 0–14 resistance.
Chemical & Media Compatibility
Suitable for compatible:
✓ Strong acids
✓ Strong alkalis
✓ Hydrochloric acid (HCl)
✓ Sulphuric acid (H₂SO₄)
✓ Chemical dosing fluids
✓ Water-treatment chemicals
✓ Corrosive process liquids
✓ Compatible gases
Media must be chemically compatible with the PVC body, PTFE sealing components and other wetted materials at the actual chemical concentration and operating temperature.
For particularly aggressive chemicals outside the useful resistance range of PVC, consider the PTFE-bodied UDC25TF.
Temperature
Media Temperature: -5°C to +80°C
Ambient Temperature: -10°C to +40°C
Maximum Media Viscosity: 20 cSt
Coil & Electrical
Coil Type: XL
Coil Power: 28 Watt
Insulation: Class F 155°C
Duty Rating: 80%
Protection: IP54
Electrical Connection: 30cm flying leads
AC Maximum ON Time: 2 hours
AC Minimum Cooling Time: 30 minutes
DC Maximum ON Time: 30 minutes
DC Minimum Cooling Time: 7.5 minutes
The manufacturer specifies 80% duty with a maximum AC energised period of 2 hours and DC energised period of 30 minutes before the required cooling interval.
Voltage Options
12V DC
24V DC
24V AC
110V AC
230V AC
AC versions are available for 50 or 60Hz operation.
Typical Applications
✓ Chemical dosing systems
✓ Acid dosing equipment
✓ Alkali dosing equipment
✓ Water treatment systems
✓ Chemical transfer systems
✓ Industrial process equipment
✓ Corrosive fluid control
✓ OEM chemical equipment
Why Choose the UDC25?
The UDC25 combines a 1" process connection with corrosion-resistant PVC and PTFE materials, isolated dry-armature construction and true zero-pressure operation.
Its 10mm orifice provides 58.3 L/min water flow at 1 Bar pressure drop, making it suitable for low-pressure chemical dosing and process systems requiring a larger pipe connection.
For chemicals requiring greater resistance than PVC can provide, the equivalent PTFE-bodied UDC25TF offers increased chemical compatibility.
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