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PRODUCTS
Retractable Injectors Injection Check Valve
Injection check valves can be added to any chemical injector or diffuser. The addition of a check valve will eliminate backflow into a chemical feed system. Spring loaded ball check valves are available depending on the size. Check valve seats are availalbe in Viton or EPDM.
Threaded SS Spring Loaded
FNPT x FNPT |
Socket Welded Spring Loaded 1/2" MNPT x Socket |
True Union Ball Check Valve Socket x Socket |
The chart below is also available as PDF file. 
3/8" Check Valve Repair Kits for use with the following series: EB-120, EB-125, EB-145, EB-162, EB-163, EB-168
Each kit contains: (2) O-ring Seals, Spring, and Teflon Ball
| Item No. | Seal Type | Spring Type |
| CRK-038-V-H-1 | Viton | Hastelloy® |
| CRK-038-E-H-1 | EPDM | Hastelloy® |
| CRK-038-K-H-1 | Kalrez® | Hastelloy® |
| CRK-038-V-A-1 | EPDM | Alloy 20 |
| CRK-038-E-A-1 | Viton | Alloy 20 |
| CRK-038-K-A-1 | Kalrez® | Alloy 20 |
| CRK-038-V-S-1 | Viton | Stainless Steel |
| CRK-038-E-S-1 | EPDM | Stainless Steel |
| CRK-038-K-S-1 | Kalrez® | Stainless Steel |
1/2" Check Valve Repair Kits
for use with the following series: EB-146, EB-155, EB-164
Each kit contains: (2) O-ring Seals, Spring, and Teflon Ball
| Item No. | Seal Type | Spring Type |
| CRK-050-V-H-1 | Viton | Hastelloy® |
| CRK-050-E-H-1 | EPDM | Hastelloy® |
| CRK-050-K-H-1 | Kalrez® | Hastelloy® |
| CRK-050-V-A-1 | EPDM | Alloy 20 |
| CRK-050-E-A-1 | Viton | Alloy 20 |
| CRK-050-K-A-1 | Kalrez® | Alloy 20 |
| CRK-050-V-S-1 | Viton | Stainless Steel |
| CRK-050-E-S-1 | EPDM | Stainless Steel |
| CRK-050-K-S-1 | Kalrez® | Stainless Steel |