Description
Injectors can be added to the discharge of a chemical feed system to help provide consistent injection into water and process lines, or into open tanks.
Injectors contain check valves or ball checks to prevent back-flow into the chemical feed system. They keep discharge lines full and prevent siphoning.
Injectors are designed to inject chemicals directly into piping, tees, valves, filters, tanks, or other specialized ports. As such, there are many types and designs for injectors. Factors such as temperature, pressure, chemicals, location, pipe size, access, serviceability, and cost must be considered.
Many chemical feed pumps will include an injector with the pump. The injector provided will be constructed of materials consistent with the pump and have a connection that is the same as the pump discharge connection/fitting. This ensures chemical compatibility and ease of installation.
Application
Generally, injectors are recommended with all types of chemical feed pumps. Some typical examples:
- A peristaltic pump pumping into a pressurized water line will require an injector or other type of check valve to prevent the backflow of chemicals into the pump when a tube fails.
- When pumping into an open tank, an injector installed at the end of the discharge tubing will keep the discharge tube full and prevent possible siphoning ensuring a consistent and accurate dose.
- When injecting corrosive chemicals into a water piping, an injector can ensure the chemical is injected into the middle of the solution flow, minimizing corrosion with the piping.
Installation and Maintenance
Installation of injectors will vary greatly depending on the type of injection fitting and location.
Injectors should be checked regularly for corrosion and fouling. Injectors can quickly become clogged with particulate or develop scaling, especially when injecting sodium hypochlorite into dirty or hard water. Some injectors include springs to keep the ball seated and may need periodic placement.
Threadless Injectors
Threadless Injectors (TI) are an alternate-method injection fitting that does not require a tee or threaded pipe to install. Threadless injectors utilize a clamp to secure the injector to the piping. They are available for use on pipe sizes 1.25 – 8” dia.
Blue-White includes injectors with most chemical feed pumps. Injectors can also be purchased separately.
Ordering Information
Materials available: Polypropylene and PVDF bodies. EPDM, FKM, O-rings. Ceramic ball check (unless noted otherwise), Hastelloy Spring
Pressure rating: 100-150 psi
Connection types: 1/4×3/8” tube compression, ½” hose barb, and ½” NPT.
Injectors for FLEXFLO® Peristaltic Pumps
| Part number | Description | Material(Body/O-ring) | Spring |
| A-014N-6A | Injection Valve, PP/FKM, ¼”x3/8” tube connection | Polypro/FKM | ½ psi |
| A-014N-6E | Injection Valve, PP/EP, ¼”x3/8” tube connection | Polypro/EP | ½ psi |
| A-014NK-6A | Injection Valve, PVDF/FKM, ¼”x3/8” tube connection | PVDF/FKM | ½ psi |
| A-014NK-6E | Injection Valve, PVDF/EP, ¼”x3/8” tube connection | PVDF/EP | ½ psi |
| A-014NK-6A-T | Injection Valve, PVDF/FKM, ¼”x3/8” tube connection (PTFE Ball) | PVDF/FKM (PTFE ball) | ½ psi |
| 71000-770 | Injection Valve, PVDF/FKM, ½” Hose Barb | PVDF/FKM | 2 psi |
| 71000-377 | Injection Valve, PVDF/EP, ½” Hose Barb | PVDF/EP | 2 psi |
| 71000-767 | Injection Valve, PVDF/FKM, ½” MNPT | PVDF/FKM | 2 psi |
| 71000-386 | Injection Valve, PVDF/EP, ½” MNPT | PVDF/EP | 2 psi |
| 71000-985 | Injection Valve, PVDF/FKM, ½” MNPT (PTFE Ball) | PVDF/FKM (PTFE ball) | 2 psi |
Injectors for CHEM-FEED® Diaphragm Pumps
| Part number | Description | Material(Body/O-ring) | Spring |
| C-395N-6A | Injection Valve, PP/FKM, ¼”x3/8” tube connection | Polypro/FKM | 6 psi |
| C-395N-6E | Injection Valve, PP/EP, ¼”x3/8” tube connection | Polypro/EP | 6 psi |
| C-395NK-6A | Injection Valve, PVDF/FKM, ¼”x3/8” tube connection | PVDF/FKM | 6 psi |
| C-395NK-6E | Injection Valve, PVDF/EP, ¼”x3/8” tube connection | PVDF/EP | 6 psi |
| C-395NK-6A-PTFE | Injection Valve, PVDF/FKM, ¼”x3/8” tube connection (PTFE Ball) | PVDF/FKM (PTFE ball) | 6 psi |
| 71000-579 | Injection Valve, PVDF/FKM, ½” Hose Barb | PVDF/FKM | 6 psi |
| 71000-580 | Injection Valve, PVDF/EP, ½” Hose Barb | PVDF/EP | 6 psi |
| 71010-611 | Injection Valve, PVDF/EP, ½” Hose Barb (PTFE Ball) | PVDF/EP (PTFE ball) | 6 psi |
| 71000-577 | Injection Valve, PVDF/FKM, ½” MNPT | PVDF/FKM | 6 psi |
| 71000-578 | Injection Valve, PVDF/EP, ½” MNPT | PVDF/EP | 6 psi |
| 71001-004 | Injection Valve, PVDF/FKM, ½” MNPT (PTFE Ball) | PVDF/FKM (PTFE Ball) | 6 psi |
| 71001-006 | Injection Valve, PVDF/EP, ½” MNPT (PTFE Ball) | PVDF/EP (PTFE Ball) | 6 psi |
Threadless Injectors
| Part number | Description | Material(Body/O-ring) | Spring |
| TI40-6V | Threadless Injector for ¼”x3/8” tube connection (for use with 1-1/4”, 1-1/2”, and 2” pipe | PP/FKM | ½” psi |
| TI48-6V | Threadless Injector for ¼”x3/8” tube connection (for use with 2-1/2” pipe | PP/FKM | ½” psi |
| TI56-6V | Threadless Injector for ¼”x3/8” tube connection (for use with 3” pipe | PP/FKM | ½” psi |
| TI72-6V | Threadless Injector for ¼”x3/8” tube connection (for use with 4” pipe | PP/FKM | ½” psi |
| TI116-6V | Threadless Injector for ¼”x3/8” tube connection (for use with 6” pipe | PP/FKM | ½” psi |
| TI152-6V | Threadless Injector for ¼”x3/8” tube connection (for use with 8” pipe | PP/FKM | ½” psi |
