Instructions (EN)

INSTALLATION INSTRUCTIONS D1000 / 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. REMOVAL 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. 81 st W. Avenue  Tulsa, OK 74127 Office: 918-241-0264  www.airtechproducts.com Cover Plate Spring Cover Upper Housing Lower Housing .3 w/ .3 w/ .3 w/ 75-16 x 1.25” lock washer 75-16 x 1.5 nylock nut .3 w/ 75-16 x 1.5 nylock nut

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#17 #30 #20 Pay 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, #15 Carefully remove O-Ring (#15) and set it aside to be reinstalled during assembly.

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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. Gently 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) Item #5 Stem Item #11 diaphragm plate Item #31 jamb nut

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Remove the connector nut and washer from stem / diaphragm and set aside for use in reassembly. At this point of the process the remaining parts will be the stem and diaphragm plate.  Reinstall the assembly to the lower housing.  Carefully align the upper housing over the stem and slide it into place w/the bolt holes aligned through the new diaphragm.  Reinstall the twelve (12) nut / bolts and securely tighten  Lift the assembly and set it back upright w/the actuator stem through the opening in the workbench.

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