Samson BR 31a DAP Operating, Assembly And Maintenance Instructions Download Page 2

 

 
 

 

2 of 18 

Specifications subject to change without notice 

Edition: August 2017

 

Maintenance  EB 31a-01_EN 

 

 

Fig. 2 – Name plates 

 

Rack-and-pinion actuators have nameplates, which show the 
following information: 

• 

Unique identification

 (variabel) 

 

1

 

Order number 

 

2

 

Position number in the order 

 

3

 

Serial number (automatically assigned) 

• 

Connection for accessories 

(fixed, depending on 

 

actuator size) 

 

4

 

AA1 to AA5 (VDE/VDI actuator size 1 to 4) 

• 

Pressure connection

 (fixed, depending on actuator size) 

 

5

 

PC1 = G 1/8“ 

PC3 = G 3/8“ 

 

 

PC2 = G 1/4“ 

PC4 = G 1/2“ 

• 

Maximum permissible pressure 

(fixed)

 

6

 

Always 10 bar for BR 31a 

• 

Principle of operation 

(variable)

 

7

 

Actuator function: 

Single-acting/double-acting 

8

 

Direction of action:  CW = Clockwise 

 

 

CCW = Counterclockwise 

9

 

Schematic diagram of the spring function with the air 

 

connection. Schematic diagram of NAMUR interface 

 

with identification for ports 2 and 4 

• 

Exact type designation 

(variable)

 

10

 

Series: 

BR 31a 

11

 

Type: 

SRP / DAP 

12

 

Actuator size: 

6 to 10000 

13

 

Spring designation:  2,5 to 6 (bar) 

• 

Opening angle

 (fixed, depending on actuator size) 

 

14

 

0-90° +5/-15°;   0-120°+/+5/-15°;   0-180° +5/-15°; 

• 

Article number 

(variable) 

 

15

 

Pfeiffer article number 

• 

Version acc. to EN

 (fixed, depending on actuator size) 

 

Example:      F07-Y-D-17 

 

16

 

Flange F07 

 

17

 

Spigot ( Y ) 

 

18

 

Diagonal square drive ( D )  

 

19

 

Square drive, width across flats 17 

• 

Torques

 (variable) 

 

20

 

Specification of the actuator torque depending on 

 

 

supply pressure. 

 
 

4.  Operating conditions 

4.1 

Operating conditions 

The rack-and-pinion actuator is suitable for use in closed and 
open environments without additional weather protection. 

 

4.2 

Warnings: 

• 

Referring to the 

Machinery Directive 2006/46/EU

, the 

actuators can be classified as “partly completed 
machinery” (see declaration of incorporation). 
As a result, the actuator cannot put into service until the 
machinery and/or the system, into which the actuator is to 
be incorporated, has been declared in conformity with the 
provisions of the 

Directive 2006/42/EU

• 

Actuators are designed, produced, and classified 
according to the 

ATEX Directive 2014/34/EU

The use of the actuators in potentially explosive 
atmosphere zones must comply with the ATEX 
classification indicated on the actuator nameplate and 
according to the ATEX safety regulations. 

• 

It is important that the actuator is used only within the 
working limits permitted in the technical specifications. 

 

 

Summary of Contents for BR 31a DAP

Page 1: ...on Actuators Before operating the unit please read this manual thoroughly and retain it for future reference Technical specifications as a result of further development of valves mentioned in these in...

Page 2: ...5 15 0 180 5 15 Article number variable 15 Pfeiffer article number Version acc to EN fixed depending on actuator size Example F07 Y D 17 16 Flange F07 17 Spigot Y 18 Diagonal square drive D 19 Square...

Page 3: ...acting and single acting actuators the operating pressure range is 2 5 bar 36 psi to 10 bar 145 psi 4 5 Operating temperatures Standard actuator from 40 C 40 F to 80 C 176 F Low temperature version S...

Page 4: ...n the counterclockwise direction In case of pressure loss at port 2 the shaft turns clockwise to the start position CLOSED SRP only The actuator is delivered in the start position Note If mounted diag...

Page 5: ...p end of the shaft are easily accessible for possible manual operation of the actuator Before mounting the actuator onto the valve make sure that the actuator is correctly aligned based on the directi...

Page 6: ...embly refer to section 6 maintenance and assembly instructions Move the actuator to the fail safe position to release the spring compression Remove the screws 24 see Fig 15 Pull the position indicator...

Page 7: ...maintenance are available to replace all seals and bearings Maintenance may be necessary between 500 000 and 1 000 000 cycles depending on the operating and or environmental conditions 6 1 Fourth gen...

Page 8: ...ton back Nylon 46 20 1 Shaft seal bottom NBR 6 1 Shaft bearing bushing top PA 46 21 1 Shaft seal top NBR 7 1 Shaft bearing bushing bottom PA 46 22 1 Right end cap GD AlSi8 5Cu3 5Fe 8 2 Thrust bearing...

Page 9: ...adjusting screws actuator versions manufactured from 2006 see Fig 17 Remove lock nuts 3 together with washers 4 Remove O rings 11 and renew them when replacing spare parts Unthread both adjusting scre...

Page 10: ...arings 6 and 7 as well as top and bottom shaft seals 20 and 21 Renew the bearing bushings 6 and 7 internal and external thrust bearing 8 as well as the seals 20 and 21 when replacing all the spare par...

Page 11: ...ther clamp the top end of the shaft in a vise or hold the shaft stationary with the corresponding counterpart and place the housing 29 in a horizontal position see Fig 23 Make sure that the cam 1 is i...

Page 12: ...4 and O rings 11 Screw the adjusting screws 2 into the housing Mounting the adjusting screws actuator versions manufactured from 2006 see Fig 30 Both adjusting screws 2 must be screwed into the housin...

Page 13: ...ted see Fig 32 Open the spring clip 18 using a suitable pair of pliers Note Make sure that the spring clip is not stretched too far Use a tool e g screwdriver to lift the cam up slightly O ring replac...

Page 14: ...piston see Fig 36 After removing the end caps hold the housing 1 stationary possibly in a vise and turn the shafts until the the pistons on both sides are released Remove both the pistons on both side...

Page 15: ...ng piston back PA 4 6 15 2 Bearing piston head PA 4 6 6 1 Shaft bearing bushing top PA 4 6 16 2 O ring piston Buna N 7 1 Shaft bearing bushing bottom PA 4 6 17 12 Spring cartridge 54 Si Cr6 8 1 Thrust...

Page 16: ...he bearing bushing 7 stationary while pressing in the shaft 4 We recommend clamping the tool into a vise as shown in Fig 43 After mounting the shaft place the thrust washer 19 on the top shaft end Mou...

Page 17: ...compression springs 17 specified in Fig 46 and according to the pattern shown in Fig 46 Fit on the end caps 3 and check to ensure that the gaskets 14 are seated properly Insert the screws 13 without...

Page 18: ...remove the plastics plugs on the air supply ports 2 and 4 8 Customer inquiries please specify the following details Type of actuator BR31a Typ DAP oder Typ SRP Size 15 30 60 100 150 220 300 450 600 9...

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