Nova-Tech LMI Roytronic Series A Metering Pump - Manual (Page 15)

15
INSTALLATION
3.9 Injection Check Valve and Discharge Tubing Installation
The Injection Check Valve prevents backflow from a treated line. Install the injection
check valve at the location where chemical is being injected into the system. Any size
NPTF fitting or pipe tee with a reducing bushing to 1/2" NPTF will accept the injection
check valve. Teflon
® tape should only be used on threads that are connected with pipes.
When installing the Injection Check Valve, be sure to position it so that the valve enters
the bottom of your pipe in a vertical position. Variations left and right within 80° are
acceptable (see illustration).
After cutting an appropriate length of tubing, connect tubing to the injection check valve
then back to the discharge side of the pump head. Make sure it does not crimp or come
into contact with hot or sharp surfaces (see Tubing Connections, Section 3.3).
Typical Injection Check Valve Installations
1" Pipe Tee
Do NOT use
Teflon tape
On machined
Threads
40°
Variation
Acceptable
Injection
Check Valve
Pipe Cross
Section
CORRECT
Use Teflon
Tape here on
Pipe threads only
Injection
Check Valve
Reducing
Bushing
1" to 1/2" NPT
(Customer Supplied)
Flow
Flow
40°
Variation
Acceptable