Pentair KEYSTONE F793 - User Manual

KEYSTONE
Rotary pneumatic positioner F793
Installation and Maintenance Instructions
Pentair reserves the right to change the contents without notice HDLDS-0046-EN-1309
Operation
Mounting to Pentair’s PremiAir and Keystone’s F79U, F79E, F790 and F796 series actuators.
1. For standard direct action operation (increasing signal to open actuator), ensure that the actuator
is in its CLOSED (fully clockwise) position, and that the flats on top of the positioner shaft are at
right angles to the longitudinal axis of the positioner.
For reverse action (increasing signal to close actuator), ensure that the actuator is in its OPEN
(fully anti-clockwise) position and that the flats on top of the positioner shaft are parallel to the
longitudinal axis of the positioner.
2. Fit the positioner to the top face of the actuator, using the correct mounting kit, so that the
longitudinal axis of the positioner is parallel to the actuator cylinder axis.
3. Ensure that the feedback cam in the positioner is correctly fitted with the correct range profile
bearing against the feedback arm roller.
(Positioners are stocked to suit 3-15 psig and direct action).
For direct action, ensure that anti-clockwise rotation of the positioner shaft will cause the cam to
compress the spring.
For reverse operation, ensure that clockwise rotation of the positioner shaft will cause the cam to
compress the spring.
4. Connect the air ports as shown in Fig. 1 for direct action and in Fig. 2 for reverse action.
Feedback Cam
Signal
Air
supply
To actuator
open port
Figure 1 - Direct operation
To actuator
close port
Exhaust
(on underside)
Feedback Cam
Signal
Air
supply
To actuator
close port
Figure 2 - Reverse operation
To actuator
open port
Exhaust
(on underside)
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Summary

Operation

Mounting to Actuators

Mount the positioner to PremiAir and Keystone actuators using the correct kit.

Direct and Reverse Operation

Connect air ports as shown for direct (Fig 1) or reverse (Fig 2) operation.

Setting and Technical Data

Setting Procedure

Follow steps to adjust zero and range settings for correct actuator operation.

Cover Fitting

Fit the main cover and position indicator cover securely.

Technical Specifications

Specifications include input signal range, supply pressure, and construction materials.

Wiring and Switch Details

Wiring Diagrams

Diagrams illustrate wiring for micro-switch and proximity switch configurations.

Micro-switch Ratings

Details ratings for standard V9 type single pole double throw micro-switches.

Proximity Switch Specifications

Specifications for Pepperl & Fuchs NJ2-V3-N proximity switches.

Cam Setting and Retrofit Procedures

Cam Setting Procedure

Adjust cams to trigger switches correctly for OPEN and CLOSE positions.

Retrofit Procedure

Instructions for fitting cam assembly and microswitch/terminal plate.

Pentair KEYSTONE F793 Specifications

General

Brand	Pentair
Model	KEYSTONE F793
Category	Valve Positioners
Language	English