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Key Features

  • 2/2 Way Normally Open
  • Fail-Open Valve Operation
  • Zero Pressure Assisted Lift
  • Anti-Water Hammer Operation
  • 1½" BSP Connection
  • NPT Thread Option
  • Zero Differential Pressure
  • AC Pressure 0 to 5 Bar
  • DC Pressure 0 to 4 Bar
  • 33mm Valve Orifice
  • 300.3 L/min Water Flow
  • Vacuum Service to 10⁻¹ Torr
  • Forged Brass Valve Body
  • Stainless Steel Internals
  • NBR Seals Standard
  • FKM & EPDM Seal Options
  • Media Temperature to +145°C
  • 18.5W Nass Magnet Coil
  • 100% Continuous Duty Coil
  • IP65 With DIN Connector
  • Multiple AC/DC Voltages
  • Optional ATEX Ex mb Coil

Datasheets

Description

1½ Inch Brass Normally Open Solenoid Valve – Zero Pressure 2/2 Way NO – Sunwell RK40


The Sunwell RK40 is a high-performance 1½ inch normally open brass solenoid valve designed for reliable operation with zero pressure differential. Its assisted-lift diaphragm design and anti-water hammer operation provide smooth valve actuation, making it ideal for water, air, vacuum, light oils and general industrial fluid control applications.

In its de-energised state the valve remains open, closing only when the coil is energised. The forged brass body combined with stainless steel internal components provides excellent strength, corrosion resistance and long service life.

Supplied with NBR seals as standard, the RK40 is also available with optional FKM or EPDM seals for enhanced media compatibility. An optional ATEX certified coil is available for hazardous area installations.

Valve Specification

Function: 2/2 way normally open
Operation: Assisted-lift diaphragm (zero pressure rated)
Port Size: 1½" BSP (optional NPT)
Orifice: 33 mm
Flow Factor (Kv): 300.3 L/min
Pressure Range:
AC Coil: 0–5 Bar
DC Coil: 0–4 Bar
Maximum Media Viscosity: 50 cSt
Opening Time: 200–500 ms
Closing Time: 1000–4000 ms
Mounting Position: Any position.

Construction

Body: Forged brass
Internal Parts: Stainless steel
Seal Material:
NBR (Standard)
FKM (Optional)
EPDM (Optional)
Electrical Connection: DIN 43650A
IP65 with connector included

Coil Specification

Coil: 18.5 Watt Nass Magnet
Class F (155°C)
100% continuous duty
Protection: IP65 with DIN 43650A connector

Voltages:

12VDC
24VDC
48VDC
110VDC
220VDC
24VAC
48VAC
110VAC
230VAC

Hazardous Area Option

Optional ATEX Ex mb certified coil available:
Ex mb IIC T4 Gb
Ex mb tb IIIC T130°C Db
Suitable for Zones 21 & 22
Maximum media temperature: +80°C
Maximum operating pressure with ATEX coil:
AC: 3 Bar
DC: 1 Bar.

Media Compatibility

Suitable for:
Air
Water
Light oils
Vacuum to 10⁻¹ Torr
Most fluids below 50 cSt viscosity
Most gases compatible with the selected seal material and valve construction.

Pressure & Temperature

Working Pressure:
AC Coil: 0–5 Bar
DC Coil: 0–4 Bar
Media Temperature: NBR: -5°C to +80°C
FKM & EPDM: -10°C to +145°C
Ambient Temperature: -20°C to +60°C.

Typical Applications

Normally open water control systems
Compressed air systems
Vacuum systems
Light oil control
General industrial process control
Cooling systems
Water treatment
OEM machinery

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View Technical Specification

Technical Specification

Brand: AAA Enterprise (Sunwell)

Model: RK40

Width: 76.00 mm

Height: 166.00 mm

Depth: 97.00 mm

Weight: 2.00 kg

Valve / Product Type: Solenoid Valve

Body Material: Brass

Voltage: 110vAC, 110vDC, 12vDC, 200vDC, 230VAC, 24vAC, 24vDC, 36vAC, 48vAC, 48vDC

Port Size: 11/2 thread

Function: 2/2 Failsafe Open

Operation: Assisted Lift from 0 Pressure

Pressure: 0.02 Bar (20 mBar), 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

Seals: EPDM, NBR, FKM (Viton)

Approvals:: ATEX Exm, IP65

Media: Air, Fluid (Non Aggressive), Gases (Non Aggressive), Oils + Fuels 50cSt Max, Vacuum (Low), Water

Found in these Categories

11/2 Brass solenoid valve 0-5 Bar 2/2 way Normally Open

£333.46 incl. VAT £277.88 ex. VAT

-27% Was £454.70 incl. VAT
Add To Cart

Brand: AAA Enterprise (Sunwell)

Model: RK40

Stock: 12 in stock

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