2" Pilot Operated Solenoid Valve N/O
Availability: In Stock
Technical Details
SKU
UBP-50K
Position
Normally Open
Port Size
2" NPT Female
Available Voltage
Select Above
Components
Stainless Steel
Seal Material
NBR
Orifice Size
50 mm
Temp Range
15°F - 175°F
Pressure Range
4.5 to 115 psi
Flow Rate
Cv 48 (Approx 372 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)
Response Time
Fast Acting (Less than one second)
Weight
8.82 lbs
Height
6.89"
Length
6.50" port to port
Width
4.72"
CAD Files
Available Upon Request
Certification
UL Recognized
Product Overview
The UBP-50K is a 2" normally open, pilot-operated brass solenoid valve designed for high-flow water, air, and compatible low-viscosity liquid applications. Its brass body, stainless steel internal components, and NBR seals provide dependable on/off flow control in industrial water systems, main utility lines, and large fluid distribution systems. With a 50 mm orifice, Cv of 48, and a flow rate of approximately 372 GPM at 60 psi, this valve is suited to applications that require high flow capacity and consistent system pressure.
This 2-way valve remains open when de-energized and closes when the solenoid coil is energized. Its normally open operation allows flow to continue during a power interruption, making it suitable for systems where maintaining flow without electrical power is important. The pilot-operated design requires a minimum differential pressure of 4.5 psi for reliable operation. It is not suitable for gravity-fed or zero-pressure systems.
The UBP-50K is available with 24V AC, 110V AC, 220V AC, 12V DC, and 24V DC coils. It supports continuous-duty operation within its rated voltage and ambient temperature limits, with a Class H coil and an operating fluid temperature range of 15°F to 175°F. Suitable media include water, air, compatible liquids, and light oils with a viscosity of up to 20 cSt, subject to material compatibility.
Common Applications
- Industrial water supply and main utility lines
- High-capacity water distribution systems
- Main utility bypass lines where continued flow during power loss is required
- Water treatment and filtration equipment
- Cooling tower water control
- Compressed air distribution systems
- Boiler feedwater and auxiliary water isolation
- Process-fluid recirculation loops
- Large manifolds and process water distribution
- Fluid-handling systems in OEM machinery
- Skid-mounted process equipment and automated control systems
- Industrial water recirculation and process utility control
Installation
- Do not use in gravity-fed systems or applications that cannot maintain the required pressure differential.
- The valve can be mounted in either a vertical or horizontal orientation.
- Confirm that the selected coil voltage matches the available power supply.
- Check brass body and NBR seal compatibility with the operating fluid before installation; do not assume compatibility with all chemicals or oils.
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.
