INSTALLATION INSTRUCTIONS D1000 / D1100

D1100 Diaphragm Replacement Replacement of main diaphragm in D1000 Series actuators is best done in a controlled indoor environment with access to pneumatic tools and a sturdy workbench. You will need either to drill a 1” diameter hole through the workbench top or fabricate a fixture with suitable recess for the actuator stem. Most of the assembly and disassembly work will be done with actuator sitting in a vertical position or inverted 180°. In either case, a penetration through the work surface will be necessary to allow the actuator body to sit in the normal position. Item numbers used throughout this document refer to drawing, “Durastroke 1000-1049 Actuator” dated 11-10-15.Cover PlateSpring Cover .375-16 x 1.25” w/lock washerUpper Housing.375-16 x 1.5 w/nylock nutLower HousingREMOVAL OF EXISTING HARDWARE: Unbolt, remove and set aside quantity four (4) Spring Cover Screws (items #16). They will be reused for reassembly. The following photo shows removed spring cover w/hardware and actuator main spring.1550 S. 81st W. Avenue  Tulsa, OK 74127 Office: 918-241-0264  www.airtechproducts.com#17 #30 #20Pay particular attention to the assembly of jamb nuts and washers at the upper end of the Spring Rod (item 17). At reassembly the distance from top of washer #30 to top of Spring Washer #20 must be restored to 1.75” (+/- .0625”) or will need to be corrected should you ever decide to add a positioner in the future. If the current configuration is a model D1000 (no positioner) and you’re certain the actuator will never need a positioner you can delete the assembly (two of item 10 and items 21, 30 and 32) holding #30 in place and discard all w/o reinstalling. Do not discard Item #20 and one of item #10 are essential and must be retained.O-Ring, #15Carefully remove O-Ring (#15) and set it aside to be reinstalled during assembly.The actuator has been inverted and the stem (item #5) is now projecting upward from the bottom of the actuator. Remove the eight (8) nut/bolt (item #8, #6) and set aside to use for reassembly. You are now ready to separate the upper and lower housing halves. When all #8 nut/bolts are removed gently pull the lower housing up and away from the upper housing (the upper housing is now on bottom) and set it to the side.Item #5 Stem Item #11 diaphragm plate Item #31 jamb nutGently remove the stem and diaphragm plate / diaphragm assembly and turn it upward. Note the presence of silicone sealant at the connector nut (item #14). A new application of sealant will need to be included at reassembly to ensure there is no air leakage through the threads of the stem / connector nut (item 14) and spring rod (item #17)Remove the connector nut and washer from stem / diaphragm and set aside for use in reassembly.