PP PPF Nylon Pneumatic Blanking Plug 4–16mm – Push-Fit Tube End Cap 20–1000pcs

Description

PP/PPF Nylon Pneumatic Blanking Plug – 4/6/8/10/12/16mm Push-Fit Tube End Cap

Pneumatic blanking plugs (also called tube end caps or port plugs) seal unused push-to-connect ports and open tube ends in pneumatic circuits. The push-fit design inserts directly into a standard push-in fitting port or onto a tube end — the internal collet grips the tube OD and the O-ring seals the bore, preventing air leakage from unused circuit branches. PP-series plugs fit directly into push-in fitting bodies; PPF-series plugs cap open tube ends. Essential for commissioning, testing, and reconfiguring pneumatic circuits without removing fittings.

Key Specifications

Material: PA66 nylon (PP series) or POM acetal (PPF series)
Tube/Port OD: 4mm, 6mm, 8mm, 10mm, 12mm, 16mm (select above)
Working Pressure: 0–1.0 MPa (0–145 PSI)
Temperature Range: 0°C to +60°C
Seal: Internal O-ring + collet grip
Media: Compressed air, water, light non-corrosive fluids
Quantity: 20, 100, 500, or 1000 pieces (select above)

PP vs PPF — Which Blanking Plug Do You Need?

PP (port plug): Inserts into the push-in port of a fitting body (tee, manifold, or multi-port fitting) to seal an unused outlet. The plug body matches the fitting’s internal bore diameter. Use when you have an unused port on a fitting that you want to seal without removing the fitting.
PPF (tube end cap): Caps the open end of a tube. The plug slides over the tube OD and the internal collet grips the tube. Use when you have an open tube end that needs to be sealed — for example, during circuit testing, when a branch is temporarily disabled, or when a tube run is extended later.

What Questions Does This Product Answer?

"How do I seal an unused port on a pneumatic tee fitting?" — Insert a PP blanking plug of the correct tube size into the unused port. The plug’s collet engages the fitting’s internal bore and the O-ring seals against the bore wall. No tools required — push until the collet clicks. To remove, press the release collar and pull out.
"Can I use a blanking plug to test for leaks?" — Yes. Blanking plugs are commonly used during circuit commissioning to seal all unused ports before pressurizing the system for leak testing. After testing, remove the plugs and connect the final tubing.
"What is the maximum pressure for nylon blanking plugs?" — 1.0 MPa (145 PSI) for standard nylon PP/PPF plugs. For higher pressures, use brass or stainless steel port plugs rated to 1.5–2.0 MPa.
"Can I reuse pneumatic blanking plugs?" — Yes, multiple times. The collet and O-ring are designed for repeated insertion and removal. Inspect the O-ring for damage before reuse — a nicked or flattened O-ring will not seal reliably.

Typical Applications

Circuit commissioning: Sealing unused ports during system build and leak testing
Manifold configuration: Blocking unused outlets on multi-port manifolds
Circuit modification: Temporarily sealing branches during reconfiguration without draining the system
Spare port protection: Keeping unused fitting ports clean and sealed during storage and transport
3D printing: Sealing unused pneumatic ports on extruder and cooling circuits