Aqua Environment 1018-400-B 1018 Series Sequence Valve for Automatic Cascading Brass Wetted Surfaces 1/4" MNPT Inlet 400 PSI Bias Pressure

The model 1018 valve is an open-shut valve having two control pressure ports. When pressure is applied to the top port the valve opens. When pressure is applied to the side control port the valve closes. When no pressure or equal pressures up to 6000 PSI are applied to both control ports the valve is held open by a bias spring.

Its primary function is control of cascade systems used for such purposes as filling breathing air cylinders and vehicle CNG (compressed natural gas) tanks. Used between a compressor and cascade system of storage tanks the 1018 valve can be used to fill the highest pressure bank first, then the next highest etc without operator assistance. Here the 1018 valve permits the compressor to operate at the pressure of the bank being filled rather than the maximum system pressure as is the case with simple priority or back pressure valves. When used between the storage banks and tank being filled the 1018 valve can deliver gas from the lowest pressure bank until equalized, then the next higher pressure bank etc without operator assistance. A one inch thread section is provided on the end permitting a way to mount the valve.

Installation

Use a suitable pipe thread sealant such as teflon tape on inlet and outlet threads. Avoid over torquing pipe thread. Normal torque applied with a 6 or 8 inch long wrench is ample. Use ample teflon tape - 3 or 4 turns, not 1 or 2 turns. The inlet is the male thread at the bottom of the valve and the outlet is the lower female thread at the side of the valve. The control pressure port to close the valve is the upper side port and control pressure to open the valve is applied at the top male port. The one inch thread at the bottom of the valve can be used to mount the valve through a one inch hole in a panel or mounting plate provided by the user. Actuating or control pressure can be any non corrosive gas or liquid at any pressure up to 6000 PSI. The regulator is NOT shipped oxygen clean and should NOT be used for oxygen service as provided.

Maintenance & repair caution

As with any regulator or valve, particulates or moisture can plug or freeze the internal filter or valve seat. This can occur when up-stream dryers are not changed or remain unused for long periods allowing corrosion materials to accumulate. In critical applications where it is important not to lose flow, a larger particulate filter should be used upstream. This reduces the tendency to freeze when moisture is present. The user should establish time intervals for changing the valve cartridge, filter and upstream dryers based on experience and service conditions.

For more information, please see Data Sheet