The 88 Series (wafer) and 89 Series (lug) butterfly valve is a zero leakage, metal seated valve that features a triple eccentric, non-rubbing conical metal seat which offers tight shut off for thousands of cycles. 

The seating of the valve is enhanced by continued operation. 

These unique design features combine to give the valve bi-directional tight shutoff on services ranging from cryogenic to 1112°F (limitations being governed by the selection of body, disc and seat material). 

This valve is inherently fire safe which means the valve can offer zero leakage before, during and after the fire as there are no soft components in the valve seating areas. 

Simple 90° operation offers a wide range of pneumatic, electric, manual gear actuators all direct mounted on ISO standard mounting flanges.

It has good control charac¬teristics through most of its travel, and with the addition of a positioner, will give control suitable for many applications.