Types 164 & 164A
Instruction Manual
Fisher Controls
Types 164 & 164A
R
Figure 1—Type 164A
Dwg. No. AE5377
August 1970
Form 1283F
Figure 2—Type 164
Dwg. No. AF8400
Lock-up system using Type 164A to close air circuit to diaphragm of main valve in case of plant air failure. Main valve will remain in position it occupied at time of supply pressure failure.
Warning system using Type 164 two-way valve to activate a whistle when pump discharge pressure falls.
TYPE NUMBER EXPLANATION
and is 1/4 ” NPT. The ports are either 1/4” or 1/2” NPT, depending on customer specifications.
Type 164 - Two-way regulator, diaphragm operated, normally open valve. Type 164A - Three-way regulator, same as above, except a special adaptor is used to provide the third outlet. INSTALLATION
Thoroughly clean and blow out all pipe lines to remove pipe scale and other foreign material. Make sure the regulator is clean before making the installation, and apply pipe compound to the male threads. This valve can be installed in any position in the pipe line. The installation should be made so that moisture cannot enter the vent, but do not plug the vent. If desirable to pipe the vent away, the vent outlet is tapped 1/4 ” x18NPT. A typical installation of the Type 164A when used as a pneumatic lockup is shown in Figure 1. The three Type 164A ports are identified as ‘‘A’’, ‘‘B’’ and ‘‘C’’. Flow can go from A to B, A to C, C to A, B to A, but not B to C or C to B. The control line connection is identified as ”D”
Series 164A regulators can be used either as two-way, or three-way valves. The bottom connection is plugged in the first use and is open on three-way applications. The two-way Type 164 regulator is normally open, and pressure applied under the diaphragm closes the port. The 164 should be installed so that flow goes from port ‘‘A’’ to port ‘‘C’’. A typical 164 installation is shown in Figure 2. Maximum inlet pressure for both the 164 and 164A is 250 psi. ADJUSTMENT
The regulator is set for the pressure shown on the paper label attached to the spring case. The spring ranges available are shown in the table. To increase the setting within a given spring range, loosen lock nut (Key No. 13 Figure 3) and turn adjusting screw (Key No. 12 Figure 3) clockwise. Turn adjusting screw counterclockwise to decrease pressure setting. Be sure to tighten locknut after pressure adjustment is made.