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© 2021 Baker Hughes Company. All rights reserved. 

Masoneilan 37/38 Actuator Instruction Manual | 3

 

Safety Information

 

 

Important 

– 

Please read before installation 

These   instructions   contain  

DANGER

WARNING

,  and 

CAUTION 

labels,  where 

necessary, to alert  you to safety related or 
other important information. Read the 
instructions carefully  

before  

installing   and  

maintaining   your   control   valve. 

DANGER  

and 

WARNING  

hazards  are  related  to  

personal  injury. 

CAUTION 

hazards involve 

equipment or property damage. Operation of 
damaged 

equipment can, under certain 

operational conditions, result  in  degraded 
process  system  performance  that  can  lead 
to injury or death. Total compliance with all 
DANGER

WARNING

, and 

CAUTION 

notices 

is required for safe operation. 

 

 
 
 
 

 

This  is  the  safety  alert  symbol.  It  alerts  you  to  potential 
personal  injury  hazards.  Obey  all  safety  messages  that 
follow this symbol to avoid possible injury or death.

 

 

 

Indicates  a  potentially  hazardous  situation  which,  if  not 
avoided, could result in death or serious injury. 

 
 
 
 
 

Indicates  a  potentially  hazardous  situation  which,  if  not 
avoided, could result in serious injury.

 

 
 
 
 
 

Indicates  a  potentially  hazardous  situation  which,  if  not 
avoided, could result in minor or moderate injury.

 

 
 
 
 
 

When  used  without  the  safety  alert  symbol,  indicates  a 
potentially  hazardous  situation  which,  if  not  avoided, 
could result in property damage.

 

 

Note: Indicates important facts and conditions.

 

About this Manual

 

  The  information  in  this  manual  is  subject  to  

change  without prior notice.

 

  The information contained in this manual, in 

whole or part, shall not be transcribed or copied 
without Baker 

Hughes’s written permission. 

  Please report any errors or questions about the 

information in this manual to your local supplier. 

   These instructions are written specifically for 

the 37/38 spring diaphragm actuator and do not 
apply for other equipment outside of this product 
line. 

 

Useful Life

 

The  current  estimated useful  life  period for  the 
37/38 actuator is 25+ years. To maximize the 
useful life of the product, it  is  essential  to  conduct 
annual  inspections,  routine  maintenance and 
ensure proper installation to avoid any 
unintended stresses on the product.   The 
specific operating conditions will also impact the 
useful life of the product. Consult the factory for 
guidance on specific applications if required prior 
to installation.

 

 

Warranty

 

Items sold by Baker Hughes are warranted to be 
free from defects in materials and workmanship 
for a period of one year from the date of shipment 
provided said items are used according to Baker 
Hughes recommended usages. Baker Hughes 
reserves the right to discontinue manufacture of 
any product or change product materials, design 
or specifications without notice.

 

 

Note: Prior to installation

 

The equipment must be installed, put into 
service and maintained by qualified and 
competent professionals who have 
undergone suitable training.

 

All surrounding pipelines must be 
thoroughly flushed to ensure all entrained 
debris has been removed from the system. 
Under certain operating conditions, the use 
of damaged equipment could cause a 
degradation of the performance of the 
system which may lead to personal injury or 
death. 
Changes to specifications, structure, and 
components used may not lead to the 
revision of this manual unless such changes 
affect the function and performance of the 
product.

 

Summary of Contents for Masoneilan 37

Page 1: ...Baker Hughes Data Classification Public Masoneilan Model 37 38 Spring Diaphragm Actuators Instruction Manual Rev D ...

Page 2: ...R REQUIREMENTS FOR OPERATION OF OTHER EQUIPMENT AT THE SITE THESE INSTRUCTIONS DO NOT PURPORT TO COVER ALL DETAILS OR VARIATIONS IN EQUIPMENT NOR TO PROVIDE FOR EVERY POSSIBLE CONTINGENCY TO BE MET IN CONNECTION WITH INSTALLATION OPERATION OR MAINTENANCE SHOULD FURTHER INFORMATION BE DESIRED OR SHOULD PARTICULAR PROBLEMS ARISE WHICH ARE NOT COVERED SUFFICIENTLY FOR THE CUSTOMER OPERATOR S PURPOSES...

Page 3: ...transcribed or copied without Baker Hughes s written permission Please report any errors or questions about the information in this manual to your local supplier These instructions are written specifically for the 37 38 spring diaphragm actuator and do not apply for other equipment outside of this product line Useful Life The current estimated useful life period for the 37 38 actuator is 25 years ...

Page 4: ...ide for the actuator stem Air connections are 1 4 NPT Connections are located in the upper diaphragm case air to extend actuators or yoke air to retract actuators Standard Actuator Size Effective Diaphragm Area sq in Maximum Stroke in 9 45 11 71 1 13 105 1 15 145 2 18 200 2 18L 200 4 Maintenance Air to Extend Actuators Type 37 Diaphragm Replacement Before disassembling the actuator all spring comp...

Page 5: ...bly the above parts Spring Adjustment The procedure is identical with that for air to extend actuators except that supply air is piped to the 1 4 port in the yoke Packing Box The packing box is subject to low air pressure only and requires minimum maintenance The packing rings have a square section and are made of carbon core with braided PTFE jacket The packing may be added to or completely repla...

Page 6: ...6 Baker Hughes 2021 Baker Hughes Company All rights reserved Air to Extend Actuators Type 37 Case Nos 9 11 13 Case Nos 15 18 18L Air to Retract Actuators Type 38 Case Nos 9 11 13 Case Nos 15 18 18L ...

Page 7: ...UT 43 Upper Diaphragm Case U D CSE 21 Snap Ring Actuator SNP RNG 44 Lower Diaphragm Case L D CSE 22 Spring Actuator ACT SPR 45 Cap Screw diaph case CAP 22A Spring Actuator ACT SPR 46 Nut diaph case NUT 26 Stem STM 56 Travel Indicator Scale T I SCL 30 Nut actuator stem NUT 57 Machine Screw Ball MCN SCR BALL 31 Packing Box PKG BOX 70 and Retainer Spring RTN SPR 32 Packing PACKING 71 Barrel Spring Ba...

Page 8: ...bakerhughes com Copyright 2020 Baker Hughes Company All rights reserved Baker Hughes provides this information on an as is basis for general information purposes Baker Hughes does not make any representation as to the accuracy or completeness of the information and makes no warranties of any kind specific implied or oral to the fullest extent permissible by law including those of merchantability a...

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