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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:schema

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.

Description

ITEMQTYPART NO.DESCRIPTION
114108-0001End Cap
214108-0002Linkage Mounting Bracket
314108-0003Linkage
414108-0004Output Link
514108-0007Spring Retainer
614224-0001Cylinder Housing
714224-0004Piston
814224-0005Retainer Plate
914224-0006End Cap
1014108-0008Piston Rod
1114108-0006Piston Rod Extension
1214108-0009Stop
1314108-0005Threaded Output Rod
1414108-0010Snap Ring Pin
1524108-0011Snap Ring Pin
16•11201-1044Spring 10-80 PSI (Black)
16•11201-1045Spring 0-100 PSI (Blue)
1711001-6216Hex Head Screw
1811001-1014Hex Head Screw
19121001-0810Hex Head Screw
2041001-0814Hex Head Screw
2111022-0210Jam Nut
2241022-0108Nut
2321022-0164Nut
2461009-0804Phillips Flathead Screw
25••1023-0242Washer
2661029-1037Snap Ring
2711104-2003Rolling Diaphragm
2821102-0007“U” Cup
2911101-0012“O” Ring

•Optional, depending on pressure configuration.
••As required for shimming.

None.