Busch O-Ring,Buna,25 X 4mm Part# 48613600

This O-ring is made for specific large Busch R5 pumps. Before you buy, check your pump model. This ring fits the following models :

• Busch R5 1000B

• Busch R5 1600BThis 25 x 4 mm O-ring is not just sold by itself. It is an important part of larger repair kits. If you buy the Major Repair Kit BMK026 for the Busch R5 1600B pump, you will get two of these O-rings inside the kit . Each kit contains two pieces of part number 48613600.

  This O-ring is made from Buna (also called Nitrile or NBR). Here is why Buna is a great choice for standard vacuum pump applications:

  • Excellent oil resistance: Buna is the best choice for sealing petroleum-based oils and fuels . Your vacuum pump is full of oil. This ring will not swell or break down.

  • Good abrasion resistance: Buna is tough. It resists wear and tear from moving parts .

  • Affordable: Buna costs less than speciality rubbers like Viton. For standard jobs, it works great and saves you money .

  • Good temperature range: Buna works well from -40°C up to 107°C (-40°F to 225°F) . This covers most normal pump operating temperatures.