New Installations - EP7 Valve
When ordering a new meter, an EP7 Series valve is mounted to the outlet side of the meter. Four standard orientations are available: Outlet Inline, Outlet Up, Outlet Front, or Outlet Rear. See the figure below.
When ordering a meter with pneumatic solenoids mounted (A26261), the valve will come pre-plumbed to the solenoids, and the solenoids pre-wired to the LCR. Air pressure, regulated to between 50 and 125 psi (3.5 and 8.6 bar) must be supplied to the valve through the elbow beneath the solenoids, as shown in the figure below. Liquid Controls strongly recommends integrating an air dryer into the upstream system.
If ordering the pneumatic solenoid assembly (502137) separately, it must be installed such that the air line connects the S1 solenoid to the bottom port of the valve and S2 to the top port. Wire the cables into the LCR according to this diagram:
New Installations - EP15 and EP30 Valves
When ordering a new meter, an EP15 or EP30 Series valve is supplied mounted to the outlet side of the meter. Three standard orientations are available: Outlet Down, Outlet Front, or Outlet Rear. See the figure below.
The 84035 Solenoid Kit is available for purchase and it can be used for both the EP15 and EP30. It contains two normally closed (NC) solenoids and two cable assemblies. Wire the cables according to the diagram below. A solenoid-operated valve are electrically grounded through the component to which it mounts.
There are two 1/4-inch NPT ports on the valve. Liquid Controls recommends mounting the solenoids in a protected location within 18 inches of the LCR (this is the length of the cables). Common NPT fittings and air lines may be used to route air to the solenoids and valves. Any components used in the installation should be able to withstand the maximum air pressure of the system.Regulate the air supply to remain within 50 and 150 psi (3.5 and 10.3 bar) at all times. Connect the air supply to the P inlet port of each solenoid. Route the A outlet port to each port on the valve. Solenoids in the kit have female ¼-inch NPT ports. If using an exhaust restrictor on one of the solenoids, it should be on S2 (closer to top of valve).
Initial Settings
The dwell time will need to be initially set by means of the LCR software. To set the initial S1 close / S2 open time in the Product Calibration menu, refer to the operation manual of the appropriate LCR register. Though the LCR will automatically detect this value, these are the recommended initial settings:
•EP7 - 3 gallons
•EP15 - 10 gallons
•EP30 - 40 gallons
Optimal settings may vary by application. Consult the factory for settings on high viscosity products.
Retrofit Installations
Relieve the internal pressure from the system, and draining the liquid from the meter and accessories. Then, remove the existing valve. Next, connect the new valve assembly and bolt it to the outlet side of the meter.
Tools required for installation include:
•Screwdriver, flat blade
•Screwdriver, Phillips
•Wrench Set
Dwell Flow Adjustment
Activate the dwell flow by energizing the S2 valve and deenergizing the S1 valve. This supplies the low-flow chamber and raises the piston f until it contacts the stop nut. Adjusting this stop nut can change the dwell flow rate from between 0 and 15% of full flow. The valve is preset to supply 5% of full flow during dwell flow. After installing the valve and filling it with fluid, this can be adjusted.
Follow these steps:
1.Loosen and remove protection cap (labeled i in the Operation section).
2.Loosen nut h and move it up about 5/16 of an inch (8 mm). Use a flathead screwdriver to keep shaft m from rotating through the S2 port.
3.Supply the low flow chamber with air.
4.Piston f will lift to the stop.
5.Re-tighten nut h until you achieve the desired line flow.
Full Flow Adjustment
The valve is not preset with any opening limitation, but this can be adjusted.
Set the shutter opening (in full-flow mode) by positioning the screw o (and the lock nut h) which acts as a stop for the shaft m attached to the shutter. See the figure above.
To decrease the flow:
1.Close the valve.
2.Keep cap I locked and unscrew the M10 nut n.
3.Adjust the M10 screw o.