BONDED METAL WASHER
THE LEAKPROOF WASHER
Flexing action of the lips under pressure provides a positive
and leak proof seal against, water, gases, oil and a wide
range of other fluids and depending upon size up to pressures
in excess of 10,000 lbf/in2 (690 bar). Comprising of synthetic
rubber sealing member bonded to a plated metallic washer,
the rubber bonded washer also called ‘Dowty Seals’
in addition to eliminating leakage, reduces tooling, installation
and maintenance costs. The face-to-face sealing dispenses
with groove cutting or special machining and reduces bolting
torque. Washers to suit various bolt sizes are available (see
list for more details). There are two types of basic designs
Regular bonded Seal
Self Centering bonded Seal
types of rubber materials are available to suit temperature
& type of fluid sealed. There are different categories
for automotive and aerospace applications. Main elastomers
used are NBR, HNBR, Flouroelastomer etc. (see elastomer selection
chart for more details). Metal washer materials are generally
coated mild or high strength steel or stainless steel.
Reliable high & low pressure Sealing.
Wide Temperature capability.
Metal ring prevents over compression and extrusion.
designs offer concentric location, positive retention and
ease of assembly/pre-assembly.
International thread sizes available.