Key Features

1" Nylon Solenoid Valve
2/2 Way Normally Closed
Zero Pressure Assisted Lift
No Minimum Pressure Required
Vacuum Capable to 10⁻¹ Torr
AC Pressure 0–7 Bar
DC Pressure 0–2 Bar
28mm Full Flow Orifice
157.3 L/min Water Flow
Glass Reinforced Nylon Body
Stainless Steel Internals
EPDM Seals as Standard
Optional NBR & FKM Seals
RO & Demineralised Water
Media Viscosity Up to 50 cSt
Media Temperature +4 to +60°C
15W AC Nass Magnet Coil
18.5W DC Nass Magnet Coil
100% Continuous Duty Rated
DIN 43650A Electrical Connection
IP65 Protection With Connector
Optional ATEX Coil Available

Datasheets

Description

1 Inch Nylon Solenoid Valve – Zero Pressure 2/2 Way NC – Sunwell PK25

The Sunwell PK25 is a high-performance 1 inch nylon solenoid valve designed for reliable operation with zero pressure differential. Its assisted-lift diaphragm design allows the valve to open from vacuum or zero pressure, making it ideal for low-pressure water systems, demineralised water, reverse osmosis (RO) equipment, vacuum applications and light chemical processes.

The corrosion-resistant nylon body combined with stainless steel internals provides excellent durability while keeping weight to a minimum. EPDM seals are supplied as standard, with optional NBR or FKM seals available for wider media compatibility.

Available with AC or DC coils, the PK25 features continuous 100% duty operation, DIN 43650A electrical connection and an optional ATEX certified coil for hazardous area installations.

Valve Specification

Function: 2/2 way normally closed

Operation: Assisted-lift diaphragm (zero pressure rated)

Port Size: 1" BSP (optional NPT or Rc)

Orifice: 28 mm

Flow Factor (Kv): 157.3 L/min

Pressure Range:

AC Coil: 0–7 Bar

DC Coil: 0–2 Bar

Maximum Media Viscosity: 50 cSt

Opening Time: 200–400 ms

Closing Time: 1000–3000 ms

Mounting Position: Coil upright preferred.

Construction

Body: Glass reinforced nylon

Internal Parts: Stainless steel

Seal Material:

EPDM (Standard)

NBR (Optional)

FKM (Optional)

Shading Ring:

Silver (AC)

None (DC)

Electrical Connection: DIN 43650A, IP65 with connector

Coil Specification

AC Coil:

15 Watt Nass Magnet

Class F (155°C)

100% continuous duty

DC Coil:

18.5 Watt Nass Magnet

Class F (155°C)

100% continuous duty

Voltages:

12VDC

24VDC

48VDC

110VDC

12VAC

24VAC

48VAC

110VAC

230VAC

380VAC

Hazardous Area Option

Optional ATEX Ex mb certified coil available:

Ex mb IIC T4

Ex mb tb IIIC T130°C Db

Suitable for Zones 21 & 22

Maximum operating pressure with ATEX coil:

AC: 2 Bar

DC: 1 Bar

(without AC shading ring).

Media Compatibility

Suitable for:

Air

Water

Demineralised water

Reverse osmosis (RO) water

Vacuum to 10⁻¹ Torr

Slight acids and alkalis

Light chemicals

Most gases and fluids compatible with the selected seal material.

Pressure & Temperature

Working Pressure:

0–7 Bar (AC)

0–2 Bar (DC)

Media Temperature: +4°C to +60°C

Ambient Temperature: +4°C to +50°C.

Typical Applications

Low-pressure water control

Reverse osmosis (RO) systems

Demineralised water systems

Chemical dosing equipment

Vacuum systems

Water treatment

Light industrial process control

Laboratory equipment

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1" Stainless Steel Solenoid Valves

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View Technical Specification

Technical Specification

Brand: AAA Enterprise (Sunwell)

Model: PK25

Width: 76.00 mm

Height: 124.00 mm

Depth: 90.00 mm

Weight: 0.60 kg

Valve / Product Type: Solenoid Valve

Body Material: Nylon

Voltage: 110vAC, 110vDC, 12vDC, 200vDC, 230VAC, 24vAC, 24vDC, 380vAC, 48vAC, 48vDC

Port Size: 1 thread

Function: 2/2 Failsafe Closed

Operation: Assisted Lift from 0 Pressure

Pressure: 0.1 Bar (100 mBar), 0.2 Bar (200 mBar), 0.3 Bar (300 mBar), 0.4 Bar (400 mBar), 0.5 Bar (500 mBar), 0.6 Bar (600 mbar), 0.7 Bar (700 mBar), 0.8 Bar (800 mBar), 1 Bar, 1.2 Bar, 1.3 Bar, 1.4 Bar, 1.5 Bar, 1.6 Bar, 2 Bar, 2.5 Bar, 3 Bar, 3.5 Bar, 4 Bar, 4.5 Bar, 5 Bar, 5.5 Bar, 6 Bar, 6.5 Bar, 7 Bar

Seals: EPDM, NBR, FKM (Viton)

Approvals:: ATEX Exm, IP65

Media: Fluid (Slight Acid/Alkali), Gases (Slight Acid/Alakli), Vacuum (Low), Water (RO/Pure/Demin)

Options required: Mounting Holes, Shading Ring - Silver

Orifice: 28mm

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Reviews

★★★★★5.0 / 5 1 reviews

★★★★★

Ordered more of these, we have them on sea water application and they still work fine after six years on desalination plant!! +++++++++++Yes will be fine so long as you avoid letting them dry out to avoid salt build up.

Reviewed on 10/03/2017 by Stuart