|Plunger Flange||This bears the load of whatever is pushing the plunger – thumb or syringe pump pusher block locked into the anti-siphon plate by the anti-siphon screw adjustment.|
|Plunger||Connects the Plunger flange where the pressure is applied through it’s shaft to the seal where it presses on the liquid in the barrel.|
|Barrel Flange||The barrel flange is supported here usually by a couple of fingers or on a syringe pump by the syringe retainer. Pressure exerted between the plunger and barrel flanges results in liquid being forced out of the syringe.|
|Barrel||Storage cylinder for the liquid which is to be dispensed. Pressure on the seal reduces the volume of the barrel below the seal expelling fluid.|
|Seal||Slides up and down the barrel in response to the pressure on the plunger. Forms a liquid seal between the plunger and barrel. In time can wear out and leak liquid. Also high pressure on the plunger can drive the plunger through the seal causing fluid leak.|
|Luer Lock||The output of the syringe is surrounded by the Luer Lock. The Luer Lock is a standardized screw fitting for attaching fittings to the syringe that will not ‘blow off’ when the liquid is under pressure. There is also a Luer Taper.|
Luer-Slip fittings conform to Luer taper dimensions and are held by friction there is no thread.
Types of Luer Lock
This diagram illustrates the three different styles of Luer lock. Their names are Luer Lock Tip, Luer Slip Centric Tip, and Luer Slip Eccentric Tip.