Jordan Valve Mark 80 Series – Self Operated Temperature Regulator - Manual (Page 6)

TYPE A BULB - STANDARD
Type A — The standard JORDAN thermal bulb that can
be used for applications requiring threading of the bulb
into a tank, piping, etc. It may also be threaded into a
thermowell. Fitting is 1” NPT. Refer to factory for special
lengths.
TYPE B BULB - PLAIN
Type B — A plain bulb which does not have a tank fitting.
It is made for suspension in open tanks. The capillary
and armor should be properly supported so that the pos-
sibility of crimping is eliminated. Type B bulbs are used
for coated bulbs. Plastisol coating is suitable for 160°F
maximum. Use Teflon for higher temperature.
Thermal System
Inverted
Mounting Tank Fitting
1” NPT
Tank
Fit
ting
1”
NPT
TYPE C BULB - FINNED
Type C — A finned bulb made for sensing atmospheres.
Its fins increase the effective exposed surface, giving the
necessary sensitivity. It is used effectively in air ducts, dry-
ing kilns, etc. Good circulation is necessary, and the bulb
is generally installed with the use of a split flange down-
stream of the blower or fan. Available in copper with alumi-
num fins only. An 8” diameter flange is optional.
TYPE D BULB - RIGID EXTENSION
Type D — A rigid extension type thermal bulb. The exten-
sion is generally a dead section. The length of the live sec-
tion is the same as the Type A, and the length of the dead
section would depend upon our requirements. Used on
large tanks where poor circulation causes false tempera-
ture readings at the walls. The tank fitting can be threaded
directly into the tank, and a well is not required.
TYPE E BULB - EXTENSION
Type E — An extended type thermal bulb that is pressure
tight. If mounted horizontally, a well is needed for support.
The length of the live section is the same as the standard
bulb.
Tank
Fitting
Tank
Fitting
Dead Section