Paste Filling Machine Parts: Identify Before Ordering

Trace the paste from supply to the container mouth, identifying the metering and cutoff functions along the way. Keep product-contact components separate from the pneumatic or servo drive that moves them.

In the supply zone, product sits in a conical or rectangular hopper, or in a U-shaped stirring hopper when sauces contain suspended particles that would otherwise settle. On the intake stroke, a pneumatic air cylinder or servo drive retracts the product piston inside a sanitary stainless-steel metering cylinder, drawing paste through a directional valve. On the discharge stroke, the valve shifts and the piston pushes the measured volume through the transfer plumbing and out of the dispensing nozzle into the waiting bottle or jar. Depending on the machine, mechanical stops or servo position settings define the stroke; reed switches detect piston positions for the control sequence. Use the build-specific drawing to identify the adjustment.

If your station uses a rotary gear head rather than a reciprocating cylinder, use our piston filler vs gear pump filler difference guide to separate pump-head components from piston-path parts.

Container-handling parts position the opening relative to the nozzle. Inspect bottle grabbers, neck locators, indexing parts, guides and conveyor wear surfaces together. Stiles Enterprises’ Liquid / Paste Filler Replacement Parts groups seals and transfer connectors alongside slat chains and gripping rubbers, reflecting these separate maintenance functions.

When you inspect the filling station, record whether the fill heads are stationary above the conveyor or mounted on a diving carrier, how bottles are stopped under the nozzles (indexing gates, pin indexing kits, or star wheels), and whether neck locators center the container mouth before the nozzle descends. If your line is transitioning from manual bottle placement to indexed conveying, our semi-automatic bottle filling line guide explains how container indexing interfaces with the filler.

Match the symptom to its location before ordering a nozzle or seal kit. After safe isolation, inspect the parts using the machine manual. Post-fill dripping can involve a worn seal, residue at the nozzle, an unsuitable cutoff arrangement or bottle departure before the dose has finished. Check these causes separately.

Before ordering parts for a dripping or inconsistent paste head, clean the valve and nozzle path according to your machine manual and observe where the leak or drip starts. Product leakage near the cylinder or valve stem can involve damaged seals, assembly, mating surfaces or operating conditions. Check each against the service procedure before selecting a replacement. Stringing or tailing at the tip on a newly introduced thick paste points to nozzle shut-off style or suck-back adjustment. Product hitting the jar shoulder instead of the center of the opening points to bottle guide rails, neck locators, or indexing gate timing.

For a round-section O-ring, geometric squeeze in percent = (effective cross-section − gland depth) / effective cross-section × 100. Use dimensions in the same unit and account for stretch and tolerances when determining the installed section. Parker’s O-Ring Handbook treats squeeze, gland fill and stretch together. Lip seals and piston cups require their own component drawings.

A worn or swollen seal can differ from its original dimensions. Match the replacement to the identified drawing and mating metal geometry, with product and cleaning conditions recorded alongside the part code.