The GRINNELL Model B302 and Model BN302 Butterfly Valves provide for efficient control in piping systems of on/off or throttling/balancing service; fluid flow; and bubble-tight shut-off. The valves are furnished with grooved ends for use with grooved couplings and can be easily adapted to flanged components utilizing GRINNELL Figure 71 Class 150 Flange Adapters. The Model BN302 Butterfly Valve with Grade “EN” EPDM Disc Seal is specifically NSF 61 Approved to Annex G and NSF372 for cold 86°F (30°C) and hot 180°F (82°C) potable water service. This valve is suitable for use with stainless steel domestic water systems.
The 2" to 12" (50 to 300mm) Model B302 or BN302 Butterfly Valve with Gear Operator is a self-locking, worm gear type. It is equipped with adjustable stop screws to lock the valve at the full open and shut positions. The 2" to 8"(50 to 200mm) Model B302 or BN302 Butterfly Valve with Lever-Lock Operator has a throttling plate that provides throttling notches every 10° for manual control in balancing up to 90° or to shut off service. The Lever may be pad-locked in any one of the positions, including opened or closed, by virtue of a locking hole located in the handle and lever.
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