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Operating Instructions for ROCO Butterfly Valve

 

____________________________________________________________________ 

 

BA50E103 

Issue 02/06 
REV 2 

ERHARD-Armaturen 

x

 D-89502 Heidenheim 

x

 Postfach 1280 

Phone +49 (0)7321 320-0  

 +49 (0)7321 320-525 

e-mail: info

@

erhard.de  Internet: http://www.erhard.de 

Page 4/13 

 

 

 
5.2   Inadmissible Operation 

 

Installation behind elbows or similar disturbing installation parts is to be prevented. 
Long-time operation in throttled position leads to higher wear. When the valve is used as 
throttling valve, it has to be checked whether the valve is suitable for the operating 
conditions.                                 
Do not exceed limiting values of the flow medium temperature. 
Do not exceed limiting values of the working pressure. 
Closed valve may only be charged up to the nominal pressure. 
For EPDM profile sealing rings and sealings: rubber parts must not get in contact with oil 
or grease (EPDM swells!). 

 
 

6       Maintenance 

 
 

6.1    Maintenance and Inspection 

 

ROCO

 Butterfly Valves are equipped with maintenance-free plain bearings. Gearbox stem 

and gearbox bearing are of the long-time lubricating type. Control of the performance and 
tightness is to be done regularly in intervals of  <= 4 years according to DVGW print 
W390.  

 

Before carrying out work on the valve, the repair valve must be 
closed and the pipe section must be made pressureless.  

 

Check external condition of the valve including operating gear. 
If necessary clean the valve and repair the coating.  
Check tightness at  the flanges.  
Check well-running of valve and operating gear.  
Move valve manually over total travel.       

 

 

Check seat tightness: close the valve.                                  
Check pressure drop upstream and downstream of the valve.  
 
 

6.2    Readjustment and Repair 
 
6.2.1 Readjustment of the Profile Ring, fig. 2. 
 

ROCO

 Butterfly Valves are equipped with a readjustable sealing system. The profile 

ring (4) can be readjusted in closed position of the valve disc. For this purpose, loosen 
the threaded pins (6) and tighten evenly the countersunk screws (5) in a crosswise 
manner. As the profile sealing ring acts very fast when tightening, we  recommend to 
proceed by taking small steps (half turn of the screws). Afterwards tighten threaded 
pins (6) by turning them in clockwise direction and thus locking the profile sealing ring. 

Содержание ROCO 5061 Series

Страница 1: ...or Nominal sizes DN 150 200 250 300 350 400 450 500 600 Pressure ratings PN 10 16 Prod No 5064 PN 10 5065 PN 16 5061 PN 16 GN 10 1 2 Performance Description see fig 1 A valve disc 3 hinged in the body...

Страница 2: ...sunk screw 16 Tab washer 6 Threaded pin 17 Hexagon screw 7 Actuating shaft 18 Shaft sealing set consisting of spacer X 8 Trunnion O rings back up rings 9 Bearing ring divided 19 Retaining ring 10 Thre...

Страница 3: ...ce between the pipe flanges should exceed the valve face to face dimension by at least 20 mm Thus the raised faces will not be damaged and the gaskets can be inserted Steel reinforced rubber seals are...

Страница 4: ...Gearbox stem and gearbox bearing are of the long time lubricating type Control of the performance and tightness is to be done regularly in intervals of 4 years according to DVGW print W390 Before carr...

Страница 5: ...nd repair corrosion protection if necessary Introduce new profile ring by turning it It must be fully inserted into the disc When the profile ring is correctly mounted it can be moved easily in the di...

Страница 6: ...Screws 6 2 3 Replacement of Shaft Sealing fig 3 Required spare parts shaft sealing set consisting of Spacer 22 1 piece External O rings 23 2 pieces Internal O ring 24 2 pieces Back up rings 25 3 piec...

Страница 7: ...tained in the groove and is not jammed between body and bearing cover 7 SKG Slider crank Mechanism 7 1 Design Features Design Figure 4 Attachable quarter turn gearbox according to the slider crank pri...

Страница 8: ...k Mechanism SKG Part Description Spare part Part Description Spare part 1 Gearbox casing 16 Indicator 2 Stem 17 Cover 3 Bearing ring 18 Gasket 4 Axial bearing 19 Cylindrical screw 5 Stem nut 20 Sight...

Страница 9: ...turn and modulating actuators SKG gearboxes are suitable for plants and pit installation as well as buried and under water installation up to a max flooding height of 6 m water column 7 3 Mounting Att...

Страница 10: ...y on turning the stop nut until the retention pin is perceptibly caught Check swinging angle by opening and closing the valve Mount cover 17 7 5 Maintenance Stem 2 and axial bearing 4 have a long time...

Страница 11: ...in intermediate positions When the valve is supplied without mounted electric actuator the travel switches have to be adjusted after mounting the electric actuator See paragraph Initial Operation Rese...

Страница 12: ...rection in which the disturbance occurred Proceeding this way you will obtain torques corresponding to the torques set at the torque switch Moreover the foreign matter can come off and be flushed out...

Страница 13: ...sured In case of faulty direction of rotation the travel and torque switches do not work Resetting the Limit Switches 1 Move the valve manually against the limit stop in indicator position C 2 Return...

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