What is the difference between a 3 parts syringe with needle with CE and ISO13485 and a two-piece syringe? Before we delve into the main differences between these two types of syringes, we need to understand the two most widely used disposable syringes on the market.

What is a 3 parts syringe with needle with CE and ISO13485?

The 3 parts syringe with the needle with CE and ISO13485 consists mainly of a jacket, a piston, a mandrel, and an optional needle. 3 parts syringe with needle with CE and ISO13485 is very popular for its low cost, smooth gliding motion, and wide range of functions it offers. The construction consists of a rubber washer located at the tip of the plunger inside the barrel.

The rubber washer acts as a sealant and creates a vacuum when the plunger is pulled down or up. A small warning about this is that the rubber tends to stick a little when rubbed against solid surfaces (e.g. the plastic barrel of a syringe). For this reason, 3 parts syringe with needle with CE and ISO13485 use lubricants (e.g. silicone oil) to prevent sticking and to achieve a smooth downward and upward movement. For many applications, the lubricant will not affect the desired result and the syringe will work as intended.

However, for some medical, laboratory and production applications, lubricants can sometimes act as contaminants and produce problematic results. But this is where the two-piece syringe comes in handy.

What is a two-piece syringe?

A two-piece syringe does not use a rubber tip on the plunger to create a vacuum seal. Instead, it uses a precision-designed, slightly oversized plunger tip that expands the barrel and creates a vacuum as it draws downwards.

The two-piece syringes are made from a polypropylene barrel and polyethylene plunger and require no lubricant to work. They are ideal for applications where foreign substances (such as silicone oil) are unlikely to interfere with the desired results.

This is the difference between a 3 parts syringe with needle with CE and ISO13485 and a two-piece syringe. We hope you find this helpful and if you have any further questions or requirements on this subject, you can contact us directly.