1-1/2" Pilot Operated Solenoid Valve N/O
Availability: In Stock
Technical Details
SKU
UBP-40K
Position
Normally Open
Available Voltage
Select Above
Port Size
1-1/2" NPT Female
Body Material
Brass
Components
Stainless Steel
Seal Material
NBR
Orifice Size
40 mm
Pressure Range
4.5 to 115 psi
Flow Rate
Cv 30 (Approx 232 GPM @ 60 psi)
Power (AC Coils)
110V AC: 22 VA | 220V AC: 23 VA | 24V AC: 22 VA
Power (DC Coils)
12V DC: 18 W | 24V DC: 18 W
Coil Connection
DIN 43650A
Coil Class
Class H (356° F)
Duty Cycle
100% ED (Continuous)
Response Time
Fast Acting (Less than one second)
*Suitable Media
Water - Liquid - Air - Light oil (Viscosity ≤ 20 cst)
Width
3.78"
Length
5.16" port to port
Height
6.30"
Weight
6.61 lbs
CAD Files
Available Upon Request
Certification
UL Recognized
Product Overview
The UBP-40K is a 1-1/2" normally open, pilot-operated brass solenoid valve designed for high-flow control of water, air, and other compatible low-viscosity liquids and gases in commercial and industrial systems. The valve remains open when power is removed and closes when the solenoid coil is energized. This fail-open operation makes it suitable for systems where maintaining flow during a power interruption is important, including process-fluid recirculation, cooling-water control, water distribution, and utility bypass lines.
Its pilot-operated design uses system pressure to assist valve operation, supporting higher flow capacity in larger piping systems. The valve features a brass body, stainless steel internal components, and NBR seals. With 1-1/2" female NPT connections, a 40 mm orifice, and a Cv of 40, it delivers approximately 232 GPM at 60 psi. Available coil options include 12V DC, 24V DC, 24V AC, 110V AC, and 220V AC. The valve is rated for continuous-duty operation and has a response time of less than one second. Its coil system is UL Recognized.
This pilot-operated valve requires a minimum 4.5 psi differential pressure for reliable operation and is not suitable for gravity-fed or zero-pressure systems.
Common Applications
- Industrial water distribution and utility supply lines
- Cooling tower water control and cooling-water loops
- Process-fluid recirculation systems
- Water treatment and filtration equipment
- Compressed air distribution systems
- Boiler feedwater and auxiliary water systems
- OEM machinery and fluid-handling equipment
- Skid-mounted process equipment and automated control systems
Because this is a normally open valve, it is best suited to applications where flow should continue when electrical power is lost. Confirm that this fail-open condition is appropriate for the system before selecting the valve.
Installation
- Install the valve in the direction indicated by the flow arrow on the body.
- The UBP series supports vertical or horizontal mounting.
- Maintain adequate, consistent system pressure, particularly in low-head or elevated installations.
- Flush piping before installation and verify that the media is compatible with the brass body, stainless steel components, and NBR seals.
- Select the coil voltage and AC/DC configuration that matches the available power supply, and operate within the applicable pressure and temperature limits.
Why UL Recognition Matters
UL Recognition confirms that the electrical components have been tested to meet UL safety benchmarks. This supports smoother inspection processes and improves acceptance in regulated installations.
*Always follow proper installation practices and confirm material compatibility with your fluid, pressure, and temperature requirements.
