Emerson EZR Series Pressure Reducing Regulator Manuál s instrukcemi stáhnout pdf (Strana 7)

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Type EZR

Figure 8. Type EZR X Body with Integral OS2 Slam Shut and PRX Pilot

B18B

Slam Shut

The pressure of the zone to be protected (generally the

pipeline on the outlet side of the regulator and after the slam

shut) is sensed by the safety manometric box (BMS).

If the pressure exceeds the set tripping pressure, the

release relay frees the valve plug.

Due to the force of the closing spring and the uid (trying to

close), the valve plug closes on the seat.

The gas ow is obstructed until the fault has been corrected

and the mechanism box manually rearmed.

To reopen the valve plug an equal pressure balance on inlet

and outlet sides of the regulator is required.

The mechanism box is rearmed after opening the

internal bypass.

Rearming and balancing are achieved at the same time.

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Emerson EZR Series Pressure Reducing Regulator Manuál s instrukcemi Strana 7