4108 ACTUATOR POSITIONER

DESCRIPTION

The 4108 Pneumatic Positioner is used to position throttles, variable delivery pumps and innumerable items that need infinite positioning. Due to its large diaphragm area and heavy spring, the 4108 is a very powerful positioning device. It is very accurate, although the accuracy decreased proportionally to the resistance of the object to be controlled. The output lever is provided with a threaded rod which permits infinite stroke selection. This is accomplished by moving the nuts on the output lever up and down, thus changing the effective lever length. Mechanical stops are provided for minimum and maximum pressure setting. The output linkage can be rotated at 90˚ increments

to provide horizontal or vertical movement. The available stroke is 5/32” (4 mm.) to 4 3/16” (106 mm.). For small output movements, the threaded rod can be inserted from the opposite side.

SPECIFICATIONS

Weight: 15 lbs. (6.8 kg)
Materials: Die-cast silicon bronze and stainless steel hardware
Maximum Supply Pressure: 200 PSI (13.79 BAR)
Operating Temperature Range: -40ºC to +90ºC
Pipe Port Size: 1/4” NPT

APPLICATIONS

• For accurate positioning and control of governors, throttles and valves
• Used anywhere low- and medium-force positioning is required

ORDERING INFORMATION

Model Designation Order Codes:

U – 10-80 PSI input pressure range
R – 0-100 PSI input pressure range

Other ranges available upon request.

The Standard Model 4108 Relay Valve is supplied as follows:

1. With adjustable stops and multi position lever
2. With 10-80 PSI pressure range

To order, state Model Number, followed by desired Model Designation Order Codes listed above.

Example: To order a standard 4108 with 10-80 PSI pressure range. Order No. 4108-U.