Jordan Valve Mark 80 Series – Self Operated Temperature Regulator - Manual (Page 4)

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Reverse Acting: 5. Make sure that the stem is stroked
fully downward so that the seats are fully open.
Loosen the spring and pull the stem down or heat
the bulb if necessary, being careful not to exceed
the upper limit of the control range by more than
30°F.
The orifices in the plate (3) and disc (4) should be
6.
fully open and in perfect alignment. If the orifices are
not properly aligned, adjust the position of the disc
on the plate by rotating the valve stem (16) causing
the disc pin (6) to move up or down, as required,
on the stem. Once the orifices are properly aligned
remove the plate and disc assembly and tighten the
disc pin locknut (7) against the disc pin (6), being
careful not to move the disc pin. Replace the plate
and disc assembly and recheck the alignment to be
sure nothing has moved.
Replace the pressure ring and cap as outlined in the
7.
“Valve Seat” section.
Thermal System
The thermal system is hermetically sealed unit con- 1.
sisting of a sensing bulb, capillary tubing, protective
armor, and actuator assembly. This unit contains the
thermostatic charge that operates the TCV. Please
do not tamper with it. In case the charge is lost, the
thermal system must be replaced as a complete
unit. It is not repairable in the field and must be
returned to the factory for repairs.
The thermal system is easily removed in the field by
2.
releasing the spring (27) compression (by rotating
the adjusting wheel (24) downwards) and remov-
ing the four filister head actuator screws (30). Do
not remove the adaptor plate (31). The valve stroke
adjustment will not be affected if the steps are fol-
lowed carefully.
Thermometer
If your Mark 801/802 Temperature Regulator is
equipped with a dial thermometer, it can be recalibrat-
ed by turning the calibrator screw slightly, or removing
the needle and replacing it while checking against a
glass industrial thermometer. Do not attempt to remove
the thermometer as it is also hermetically sealed with
the thermal system.
Torque
Torque for bolts (2) connecting valve cap to valve body
(inch/pounds).
Valve Size
Valve Body Material
Ductile Iron
Bronze
Carbon Steel
Stainless Steel
1-1/2" – 2" 140 150