IPL Zerk Adaptor Cap

IPL Zerk Adaptor Cap

The Zerk Adaptor Cap is used to keep the Zerk Adaptor free from dirt and moisture. Zerk Adaptors are grease gun attachments and grease dispensing tips to help with both handheld applications and industrial dispensers. The IPL Zerk Adaptor is also suitable to insert into the IPL Injector.

Grease or Zerk fittings are permanently installed by either a (taper) thread or straight push-fit (‘hammer in’) arrangement. This leaves a nipple connection that a grease gun can attach to. The pressure supplied forces a small captive bearing ball to move back against the force of its retaining spring. This is essentially a valve that opens under pressure, lets lubricant pass through a channel and into the voids of the bearing. When the pressure ceases, the ball returns to its closed position. The ball excludes dirt and functions as a check valve to prevent grease escaping back out of the fitting. The ball is almost flush with the surface of the fitting. This is so you can wipe it clean and reduce the amount of debris carried with the grease into the bearing.

The common convex shape of the fitting allows the simple concave tip of the grease gun to seal against the fitting easily from many angles, yet with a sufficiently tight seal to force the pressured grease to move the ball and enter the fitting, rather than simply oozing past this temporary annular (ring-shaped) seal. For higher pressure greasing, the grease gun end latches onto the nipple. This then seals as a butt joint. If you don’t align this type of gun end perfectly with the nipple, it will leak. You release the nozzle by angling the nozzle to break the seal with the nipple. When you break the seal, the pressure in the nozzle releases and this releases the latching fingers.