Jordan Valve Mark ED & ET Series (8) Globe Style Control Valve User Manual

Page 6

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Making Up the Stem Connection Cont.,

Reverse-Acting Actuators

Close the valve plug ensuring the valve plug is on

the seat.

Supply enough spring force to the actuator stem to

ensure the actuator is in full “Down” position. In-

crease the loading pressure to the diaphragm case

to allow the actuator stem to rise sufficiently so the

locknuts can be screwed onto the valve plug stem.

Thread the locknuts down on the valve plug stem

as far as possible. Set the travel indicator on the

locknuts, “cupped” edge downward.

Slowly release the pressure in the diaphragm case,

allowing the actuator to return to the full down posi-

tion. Measure the distance between the lower end

of the actuator stem and the travel indicator disc.

Increase the load on the actuator, causing the stem

to rise up by approximately 1/8”. Using the two-

piece stem connector and cap screws, secure the

actuator stem and valve plug stem together.

Move the travel indicator disc against the bottom of

the stem connector.

Secure the disc with the upper locknut. Change the

travel indicator scale so that it reads closed.

Open the valve plug by increasing the diaphragm

loading pressure. Secure the lower stem locknut

against the upper locknut. The connection is now

complete.

To increase travel see “To increase desired length of

travel” instructions.

arts

rderIng

A serial number identifies every Mark E Series valve

body-bonnet assembly, which can be found on the front

of the valve. Please refer to this number when contact-

ing your Jordan Valve representative.

ark

anD

ET S

EriES

inch

lobE

TylE

onTrol

alVES