Key Features
- 2" WRAS Water Solenoid Valve
- 2/2 Way Normally Closed
- Pressure Assisted Diaphragm
- 0.5–10 Bar Pressure Range
- 45mm Orifice
- Kv 34 m³/h Flow Capacity
- 2" BSPP Connection
- Latest WRAS Approval No. 250702716
- Potable Water Applications
- Brass Valve Body
- Brass & Stainless Internals
- EPDM Seals
- -10°C to +85°C Media
- Fluids Up To 37 cSt
- 360ms Opening Time
- 650ms Closing Time
- 9W DC Solenoid Coil
- 100% Duty Rated
- IP67 Protection
- 12V or 24V DC Options
- 24–230V AC Options
- Free next working day UK delivery
Datasheets
Description
2" WRAS Water Solenoid Valve 0.5–10 Bar – ASCO Sirai L182D48
The ASCO Sirai L182D48-2 is a 2" BSP WRAS approved brass solenoid valve designed for high-flow potable water, commercial water services, water treatment and industrial water-control applications.
As the largest and highest-flow model in the L182D-BIG Series, this 2/2 way normally closed, pressure-assisted diaphragm valve combines a 45mm orifice with a Kv flow factor of 34 m³/h. Operating from 0.5 to 10 Bar differential pressure, it is particularly well suited to large commercial and industrial water systems where high flow and dependable automatic shut-off are required.
Valve Function & Operation
Function: 2/2 Way Normally Closed
Operation: Pressure Assisted Diaphragm
Design: Full Orifice Pilot Operated
Minimum Differential Pressure: 0.5 Bar
Maximum Differential Pressure: 10 Bar
Maximum Allowable Pressure (PS): 10 Bar
The pressure-assisted design uses the differential pressure across the valve to operate the large main diaphragm, allowing high flow capacity without requiring a correspondingly large electrical operator.
2" BSPP Connection & High Flow
Port: 2" BSPP Female
Thread Standard: ISO 228
Orifice: 45mm
Kv Flow Factor: 34 m³/h
With a Kv of 34 m³/h, the 2" model provides the highest flow capacity in the L182D-BIG range and is particularly suitable for larger pipework where minimising pressure loss through the control valve is important.
WRAS Approved EPDM Seals
The L182D48 uses EPDM sealing materials and is specified as a WRAS certified solenoid valve.
✓ Latest WRAS Approval No. 250702716
✓ Approval Valid Until 31 July 2030
Body: Brass
Internal Components: Brass & Stainless Steel
Guide Assembly: Stainless Steel
Seat: Brass
Seals: EPDM
Shading Ring: Copper
The robust brass and stainless steel construction makes the valve particularly suitable for commercial plant and industrial water-control systems.
Potable Water Applications
Suitable applications include:
✓ Potable Water Systems
✓ Commercial Water Services
✓ Water Treatment Equipment
✓ Industrial Process Water
✓ High Flow Water Control
✓ Plant Room Installations
✓ Building Services
✓ Compatible Liquids
Maximum Media Viscosity: 37 cSt
For liquids other than water, compatibility with the EPDM, brass, stainless steel and other wetted materials should be confirmed before use. The manufacturer specifies the valve for compatible liquid and gaseous fluids.
Temperature Range
Media Temperature:
-10°C to +85°C
Ambient Temperature:
-10°C to +50°C
Maximum Viscosity:
Approximately 37 cSt
These ratings make the L182D-BIG suitable for a wide range of cold and hot-water control duties within its specified temperature limits.
Switching Performance
Opening Time: 360ms
Closing Time: 650ms
The controlled response is appropriate for the large diaphragm and high flow capacity of the 2" valve.
Solenoid Coil
Coil: ZA10A
DC Power: 9 Watts
AC Power:
23VA Inrush
14VA Holding
Duty Cycle: ED 100% Continuous
Insulation: Class F 155°C
Optional Insulation: Class H 180°C
Encapsulation: Fibreglass Reinforced PPS
Protection: IP67 with Connector
Despite controlling a 45mm main orifice, the valve requires only 9W DC, making the pressure-assisted design relatively energy efficient for its flow capacity.
Electrical Connection
Connection: DIN 46340 3-Pole
Connector Standard: EN 175301-803
Protection with Connector: IP67
Voltage Options
DC:
✓ 12V DC
✓ 24V DC
AC:
✓ 24V AC
✓ 110V AC
✓ 230V AC
Other voltages and frequencies are available on request.
Additional Control Options
The 2" L182D-BIG can also be supplied in alternative configurations for specialist control applications, including:
✓ Normally Open Versions
✓ 6V DC Latching Options
✓ 12V DC Latching Options
✓ Special Configurations On Request
These options allow the same high-flow valve platform to be used where a different fail position or very low electrical energy consumption is required.
Installation
The valve may be installed in any mounting position, although installation with the solenoid coil vertically upwards is preferred.
Dimensions & Weight
For the 2" L182D48:
Overall Length: 157mm
Overall Height: 150mm
Maximum Width: 114mm
Weight: Approximately 2.99kg
Serviceable Industrial Design
The L182D-BIG is designed with replaceable internal components, allowing the principal service parts to be replaced without changing the complete valve.
Available service components include:
✓ Replacement Core Kit
✓ Replacement Diaphragm Kit
✓ Replacement ZA10A Coil
The 1½" and 2" models use the same diaphragm kit, which can simplify maintenance and spare-parts stocking where multiple L182D-BIG valves are installed.
Typical Applications
✓ Potable Water Systems
✓ High Flow Water Control
✓ Commercial Plant Rooms
✓ Water Treatment Equipment
✓ Industrial Process Water
✓ Large Water Distribution Systems
✓ Building Services
✓ Washdown Systems
✓ OEM Machinery
✓ General Water Shut-Off
Why Choose the 2" L182D48?
The principal advantage of the 2" L182D48 is maximum flow capacity.
Its 45mm orifice and Kv 34 m³/h make it the highest-flow model in the L182D-BIG family, providing approximately 26% more Kv capacity than the 1½" version while retaining the same 0.5–10 Bar operating range.
Combined with WRAS certification, IP67 protection, 100% continuous duty and serviceable industrial construction, it provides a strong solution for larger commercial water systems, industrial process applications and plant installations requiring reliable high-flow shut-off.
L182D-BIG Range
1¼" BSP – 30mm Orifice – Kv 15 m³/h
1½" BSP – 45mm Orifice – Kv 27 m³/h
2" BSP – 45mm Orifice – Kv 34 m³/h
All three sizes operate from 0.5 to 10 Bar.
Related Products & Categories
Technical Specification
Brand: Asco / Sirai
Model: L182D48-2
Width: 110.00 mm
Height: 114.00 mm
Depth: 157.00 mm
Weight: 4.80 kg
Valve / Product Type: Solenoid Valve
Body Material: Brass
Voltage: 110vAC, 12vDC, 230VAC, 24vAC, 24vDC
Port Size: 2 thread
Function: 2/2 Failsafe Closed
Operation: Pressure Assisted from 0.5 Bar
Pressure: 3 Bar, 3.5 Bar, 4 Bar, 4.5 Bar, 5 Bar, 5.5 Bar, 6 Bar, 6.5 Bar, 7 Bar, 7.5 Bar, 8 Bar, 8.5 Bar, 9 Bar, 10 Bar
Seals: EPDM
Approvals:: IP65, WRAS
Media: Water
Options required: Anti Water Hammer
Orifice: 45mm
Found in these Categories
- 2" WRAS Valves
- 2 Brass Solenoid Valves
- Water Solenoid Valves
- WRAS Solenoid Valves
- 2 Solenoid Valves
- 10 Bar Solenoid Valves
- 2/2 Normally Closed Solenoid Valves
- 2/2 Normally Closed - Pressure Assisted
- WRAS Approved Brass Solenoid Valves
- Brass Solenoid Valves by Port Size
- 2" BSP General Solenoid Valves
- General Purpose Solenoid Valves
- Large (11/4" - 3")
- WRAS Brass Solenoid Valves
- WRAS Water Solenoid Valves
- WRAS Solenoid Valves
- WRAS Brass Solenoid Valves
- WRAS Brass Solenoid Valves - Normally Closed
- WRAS Brass Solenoid Valves - 2/2 Normally Closed
- Brass Solenoid Valves
- WRAS Approved Solenoid Valves
- WRAS Approved Valves
2" WRAS Water Solenoid Valve N/Closed – ASCO Sirai L182D48
£331.93 incl. VAT £276.61 ex. VAT
-63% Was £907.99 incl. VAT