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Summary of Contents for DeZurik 145
- Page 1 DEZURIK MODELS 145 AND 250 DIAPHRAGM ACTUATOR ISO MOUNTING D10368 Instruction September 2015 DeZURIK, Inc. Sartell, Minnesota USA | Phone: 320-259-2000 | www.dezurik.com | info@dezurik.com...
- Page 2 Safety label(s) on the product indicate hazards that can cause injury or death. If a safety label becomes difficult to see or read, or if a label has been removed, please contact DeZURIK for replacement label(s). Personnel involved in the installation or maintenance of valves should be constantly alert to potential emission of pipeline material and take appropriate safety precautions.
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Page 3: Table Of Contents
DeZURIK DeZURIK MODELS 145 AND 250 DIAPHRAGM ACTUATOR ISO MOUNTING Table of Contents Description - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -... -
Page 4: Description
DeZURIK MODELS 145 AND 250 DIAPHRAGM ACTUATOR ISO MOUNTING Description The DeZURIK Model 145 or 250 Diaphragm Actuator is a pneumatic rack-and-gear spring-return rotary actuator used for on-off or modulating control. The actuator is used on a quarter-turn valve with an ISO actuator mounting configuration. -
Page 5: Spring Pre-Compression
12 ± 2 foot pounds (16 ± 3 Nm) for the Model 145 or 18 ± 2 foot pounds (24 ± 3 Nm) for the Model 250. - Page 6 DeZURIK DeZURIK MODELS 145 AND 250 DIAPHRAGM ACTUATOR ISO MOUNTING Figure 1-Parts Identification September 2015 Page 6 D10368...
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Page 7: Removing Actuator From Valve
DeZURIK DeZURIK MODELS 145 AND 250 DIAPHRAGM ACTUATOR ISO MOUNTING Removing Actuator From Valve Refer to Figure 1 for component identification. 1. Shut down the flow in the pipeline. Flow in the pipeline with the actuator removed can allow the valve to slam closed and cause personal injury and/or damage to the flow system. -
Page 8: Actuator Disassembly
DeZURIK DeZURIK MODELS 145 AND 250 DIAPHRAGM ACTUATOR ISO MOUNTING Actuator Disassembly Refer to Figure 1 for component identification. 1. Remove the actuator from the valve as described in the Removing the Actuator from Valve section. 2. Apply just enough air pressure to the actuator to relieve the force on the stop bolts (B23) and back out both stop bolts several turns. - Page 9 Then tighten the screws in a crisscross pattern to 12 ± 2 foot pounds (16 ± 3 Nm) for the Model 145, or to 18 ± 2 foot pounds (24 ±...
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Page 10: Reversing Actuator Action
DeZURIK DeZURIK MODELS 145 AND 250 DIAPHRAGM ACTUATOR ISO MOUNTING Reversing Actuator Action Follow the steps below to change the actuator from spring-to-close to spring-to-open or vice versa. Refer to Figure 1 for component identification. 1. Remove the actuator from the valve as described in the Removing the Actuator from Valve section. - Page 11 Then tighten the screws in a crisscross pattern to 12 ± 2 foot pounds (16 ± 3 Nm) for the Model 145, or to 18 ± 2 foot pounds (24 ±...
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Page 12: Changing Actuator Mounting Position On Valve
DeZURIK DeZURIK MODELS 145 AND 250 DIAPHRAGM ACTUATOR ISO MOUNTING Changing Actuator Mounting Position on Valve Before changing the actuator mounting position, check to assure that clearance is available for the proposed actuator location. The actuator may be mounted on the valve in either of two positions- standard or 180º-both perpendicular with the pipeline, as shown on the installation drawing. - Page 13 If you use metric fasteners with ASME Class 150/300 bolt holes and flange bolt patterns, you do so at your sole risk and any liability associated with such use shall not be the responsibility of DeZURIK, Inc. In addition to the foregoing, DeZURIK’s Manufacturer’s Conditions apply.
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