Unox 3-Way Motorized Proportional Hot Oil Valve

What is a Proportional Hot Oil Valve?

A hot oil valve is a type of valve designed to control the flow of hot oil or other high-temperature liquids. These valves are commonly used in industrial or commercial environments, such as process plants or power stations, where high temperatures and pressures are present. Hot oil valves can be applied in heating, cooling, lubrication, and temperature control applications and are typically made from materials that withstand high temperatures and the corrosive effects of hot oils.

What is a Control Valve?

A control valve regulates fluid by adjusting the flow passage size in response to a signal from a controller. Control valves enable pressure, temperature, flow, and level control in all fluid-containing processes. They allow fluids such as cold water, hot water, steam, hot oil, and gases to be transported and controlled without loss.

Working Principle of a Proportional Hot Oil Valve

The proportional control principle refers to a system where the control signal is directly proportional to the error between the desired setpoint and the actual process value. In other words, the magnitude and direction of the control signal are adjusted according to the error.

This type of control is used in applications where a process variable must be maintained at a specific setpoint or within a certain range. The control signal is generated by a controller that compares the setpoint with the process value and calculates the error. The controller then applies a proportional control signal to the process. Typically, this signal is applied through a control element such as a valve, which adjusts the flow of fluid or the position of a mechanism to achieve the desired process condition.

General Features of the Hot Oil Valve

• Product: 3-Way Motorized Proportional Hot Oil Valve (with metal bellows)

• Sizes: DN15 / DN20 / DN25 / DN32 / DN40 / DN50 / DN65 / DN80 / DN100 / DN125 / DN150

• Application: Pressurized steam and hot oil lines

• Function: Distributor / Mixer

• Sealing Class: CLASS IV Metal-to-Metal

• Connection Standard: Flanged (DIN1092-2)

• Pressure Class: PN16–PN25 (optional PN40)

• Maximum Operating Temperature: 350 °C

• Stem Sealing: Metal Bellows – V-Package

• Characteristic: On–Off

• Fail-Safe: Maintains position when power is lost

Electric Motor Specifications of Hot Oil Valve

• Power Supply: 24 VAC / 24 VDC / 220 VAC (3-Point Floating Control)

• Actuating Force: 1000 N – 2200 N – 2500 N – 3000 N

• Stroke: DN15–50 → 20 mm; DN50–100 → 30 mm

• Stroke Completion Time: DN15–50 → 20 s; DN50–100 → 30 s

Material Specifications of Hot Oil Valve

• Body: GGG–40.3 Ductile Iron

• Cover: GGG–40.3 Ductile Iron

• Stem Connection: ST44-3 (S275J0)

• Actuator Housing: AL6063 ENJ – ABS Plastic

• Seat: Stainless Steel 1.4571 (AISI 316)