Pulsafeeder J41874 PTT1 Injection Back-Check Valve - 3/8-Inch OD Tubing
PTT1 wet-end injection valve with FPP body, PTFE seat and PTFE check ball. Uses 3/8-inch OD discharge tubing and a 1/2-inch male NPT process fitting.
Choosing the Correct Injection Valve for a PTT1 Metering Pump
The Pulsafeeder J41874 is a PTT1 wet-end injection valve that combines an FPP body with a PTFE seat and PTFE check ball. Its 3/8-inch OD tubing connection makes it suitable for the corresponding PULSAtron discharge arrangement.
Connection Details at a Glance
- Part Number: J41874
- Wet-End Code: PTT1
- Discharge Tubing: 3/8-Inch OD
- Process Thread: 1/2-Inch Male NPT
- Valve Housing: FPP
- Seat: PTFE
- Check Ball: PTFE
Why Tubing Size Matters
A properly matched injection valve must connect securely to the discharge tubing. J41874 is listed for 3/8-inch OD tubing, while J41875 is listed for 1/2-inch OD tubing. Selecting the correct part prevents mismatched fittings during pump servicing.
Role in Chemical Feed Systems
The valve is positioned at the process injection point, where the pump discharge line meets the receiving system. Its internal check mechanism helps prevent process liquid from moving backward toward the metering pump.
FPP and PTFE Wetted Components
The FPP housing and PTFE seat and ball distinguish the PTT1 injection valve from assemblies using PVC, Hypalon, Viton or ceramic components. Confirm that the original pump uses this material configuration.
Practical Maintenance Checklist
- Check the original pump nameplate for the PTT1 wet-end code.
- Confirm that discharge tubing has a 3/8-inch outside diameter.
- Inspect the valve for crystallization, deposits or restricted flow.
- Verify that the process fitting accepts 1/2-inch male NPT.
- Isolate and depressurize the system before removing the valve.
Ordering Information
Use J41874 when replacing the specified FPP/PTFE/PTFE injection valve on compatible PTT1 PULSAtron pumps.
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