The block valves consist of swiveling ball ended stems that helps to separate the pressure instruments from the process . During normal operation the block valves are open & will close to allow bleed valve venting pressureto atmosphere .

Cost Saving

The PT Two-Valve Calibration Manifolds are used on static pressure transmitters, switches or gauges. The shutoff valve, tee, calibration valve, and all immediate tubing/fittings are available in one simple manifold. The PT manifolds are available with either metal seats or replaceable soft seat inserts. The PTM manifold features a unique valve seat that can be converted from soft to hard by simply removing two insert washers. No other parts are required. The PT7 manifold is available for elevated temperatures and features an integral metal seat inserts.

The A30 is a direct mounting two-valve manifold which combines an isolation valve and a vent/calibrate valve in a single unit. Standard process connections are 1/2-inch NPT threaded. The vent/calibrate port is threaded 1/4-inch NPT and provided with vent plug as standard. Suitable for pressures to 6000 psig [414 barg] and temperatures of up to 1000°F [538°C]. A30 has metal seated valves and is available with standard valve bonnets with Teflon® stem packing, or high temperature bonnets which have Graphite packing. All manifolds are supplied with two 7/16-inch UNF bolts and an instrument seal ring as standard.