Since 32 ° F (0 ° C) is the freezing temperature of water, any moisture in the medium will freeze, causing the valve to jam. In addition, as the temperature decreases, the elastomer will harden to the point where the valve may leak.
The standard catalog 2-way NICE valve is not designed to maintain pressure. Back pressure occurs when downstream pressure exceeds inlet pressure. This may prevent the valve from closing. If you have specific back pressure requirements, consult the factory.
Generally, due to the different design of the solenoid valve, the PFC solenoid valve cannot be converted from A / C to D / C and vice versa. By changing the coil, the voltage can be changed within the same current type (eg, 120/60 to 240/60 or 12 / DC to 24 / DC).
In direct-acting valves, the solenoid spool opens or closes the orifice directly, depending on whether the solenoid valve is energized or de-energized. The valve will operate from zero PSI to the rated maximum pressure. The pilot valve has a pilot hole and a vent hole, and is operated using line pressure. When the solenoid valve is energized, the magnetic core opens the pilot hole, releasing the pressure from the top of the valve piston or diaphragm to the valve outlet side. This can cause pressure imbalance, which lifts the piston or diaphragm away from the main orifice. When the solenoid valve is de-energized, the pilot hole is closed, and full line pressure is applied to the top of the piston or diaphragm, and the valve is closed.
The minimum working pressure difference is the pressure difference required to open the valve and keep it open. For two-way valves, this is the pressure difference between the inlet and outlet. For three-way and four-way valves, this is the pressure difference between the pressure and the exhaust port. The maximum working pressure difference refers to the maximum pressure difference between the inlet and outlet of the solenoid valve that can safely operate the valve.
The flow channel is the direction in which the medium must pass through the valve to work properly. They vary according to the valve and piping instructions, and should be followed carefully as shown in the installation and maintenance instructions included with each valve.
Yes, many of our valves are designed to be one-to-one.
It depends on the valve, but the maximum pressure can be in the range of 115 psi for our 5/2 valves to 575 psi for our 3/2 valves. Pilot valves require a minimum pressure of 25-45 PSI, depending on the valve. If the minimum pressure requirements are not met, some pilot operated valves can be piloted externally.
Some of our small 2 and 3 port valves are direct acting, but our large 2/2 and 3/2 valves and all our 4 port valves are pilot assisted.
