These operating instructions must be available to all users at all times. GEFA Processtechnik GmbH is not liable for unauthorized changes of the device or for improper use.
If contradictory identifications occur, speak with the responsible authority. All PPE (personal protective equipment) must be provided by the user of the valve. 5 / 61 Version 10 • DocID 73998091 Internet: www.gefa.com • E-Mail: gefa@gefa.com...
The valve is used exclusively for shutting off, throttling and regulating media flows under the Consideration of the data given on the valve and technical details given in this manual Data, diagrams, applications described and only in connection with the components, which are recommended by GEFA Processtechnik GmbH, ap- proved and mentioned in this documentation.
2.6 Product safety The valves of GEFA Processtechnik GmbH correspond to the state of the art and the prescribed safety rules, but nervertheless hazards can occur in connection with valves. The valve may only be operated in proper condi- tion, in the intended area and under consideration of all associated documentation. Any change to the valve may only be made after approval by the manufacturer.
- without fixation. Pneumatic or hydraulic actuators must be operated at the agreed design pressure. Pay attention to the maximum permissible operating pressure. 8 / 61 Version 10 • DocID 73998091 Internet: www.gefa.com • E-Mail: gefa@gefa.com...
3 Scope of delivery 3.1 Exploded view DN50-300 (The description of the components can be found at the end of the chapter) 9 / 61 Version 10 • DocID 73998091 Internet: www.gefa.com • E-Mail: gefa@gefa.com...
3.2 Exploded view DN350-500 (The description of the components can be found at the end of the chapter) 10 / 61 Version 10 • DocID 73998091 Internet: www.gefa.com • E-Mail: gefa@gefa.com...
3.3 Exploded view DN600-800 (The description of the components can be found at the end of the chapter) 11 / 61 Version 10 • DocID 73998091 Internet: www.gefa.com • E-Mail: gefa@gefa.com...
3.4 Exploded view BK DN50-300 (The description of the components can be found at the end of the chapter) 12 / 61 Version 10 • DocID 73998091 Internet: www.gefa.com • E-Mail: gefa@gefa.com...
3.5 Exploded view BK DN350-500 (The description of the components can be found at the end of the chapter) 13 / 61 Version 10 • DocID 73998091 Internet: www.gefa.com • E-Mail: gefa@gefa.com...
3.6 Exploded view BK DN600-800 (The description of the components can be found at the end of the chapter) 14 / 61 Version 10 • DocID 73998091 Internet: www.gefa.com • E-Mail: gefa@gefa.com...
3.7 Bearing protection and vacuum seal DN50-800 (optional) (The description of the components can be found at the end of the chapter) 15 / 61 Version 10 • DocID 73998091 Internet: www.gefa.com • E-Mail: gefa@gefa.com...
For valves that are delivered without actuation, the shut-off element is not secured against adjustment. It must be transported in such a way that it can not be opened from the closed position by external influences (eg vibration). 17 / 61 Version 10 • DocID 73998091 Internet: www.gefa.com • E-Mail: gefa@gefa.com...
If the exact end position is exceeded, bring the valve back into the open or partly open posi- tion. Then approach the end position again from the open position. 18 / 61 Version 10 • DocID 73998091 Internet: www.gefa.com • E-Mail: gefa@gefa.com...
(ØDi ≥ ØL + 6 mm). This must be checked before the valve is installed and compared with the space necessary for the valve according to the table. ØL 19 / 61 Version 10 • DocID 73998091 Internet: www.gefa.com • E-Mail: gefa@gefa.com...
1.1 x ∆Pmax (maximum allowable differential pressure) or 1.1 x PS (maximum allowable pressure) with the shut-off element closed, the lower value must be used. NOTICE Flushing process The valve must not be switched during the flushing process. 20 / 61 Version 10 • DocID 73998091 Internet: www.gefa.com • E-Mail: gefa@gefa.com...
Carefully open and close the valve in order to ensure that the shut-off element is not getting in touch with the pipeline. Check that the disc has adequate clearance. 21 / 61 Version 10 • DocID 73998091 Internet: www.gefa.com • E-Mail: gefa@gefa.com...
The throttling and control range in an intermediate position with an opening of 0 to 20% is not permissible in the long run, as the flow rate will be excessive high and the valve will be damaged. 22 / 61 Version 10 • DocID 73998091 Internet: www.gefa.com • E-Mail: gefa@gefa.com...
Valves that regularly remain in one position must be operated at regular intervals to ensure their mobility. The valve may only be operated by trained persons who know the operating instructions, understand them and can work in accordance with. 23 / 61 Version 10 • DocID 73998091 Internet: www.gefa.com • E-Mail: gefa@gefa.com...
The valves of GEFA Processtechnik GmbH are as far as possible maintenance-free. However, for operational safety reasons, all valves should nevertheless be checked regularly, for example by assessing the external con- dition and their accessories.
Since the operator of the valve is responsible for a safety classification, it is essential to observe and comply with all local and company standard safety precautions. 26 / 61 Version 10 • DocID 73998091 Internet: www.gefa.com • E-Mail: gefa@gefa.com...
The opening of pneumatic actuators or pneumatic cylinders, which are equipped with a closing or opening spring, is associated with increased risk. It is essential to follow the maintenance and re- pair instructions. Maintenance and repair instructions can be found on www.gefa.com or request them directly from us.
4 x 18 4 x 22 (1) MULTITOP mounting plate and square – adapter for direct mounting of actuators with larger connection flange.Special designs possible. Subject to changes 28 / 61 Version 10 • DocID 73998091 Internet: www.gefa.com • E-Mail: gefa@gefa.com...
Face to face dimension: EN 558-1 line 20 (DIN 3202-K1) Mounting plade DIN 6885 Mounting plate ØA ØB ØL ØM nxØP ISO 5211 14“ 4x18 16“ 4x22 20“ 4x22 Subject to changes 29 / 61 Version 10 • DocID 73998091 Internet: www.gefa.com • E-Mail: gefa@gefa.com...
Materials Hand lever: stainless steel Hand lever accessories: Stainless steel ØB 2“ 2 ½“ 3“ 4“ 5“ 6“ Weight of hand lever including accessories: Subject to changes 35 / 61 Version 10 • DocID 73998091 Internet: www.gefa.com • E-Mail: gefa@gefa.com...
Page 43
( ≥ DN300) ( ≥ DN300) ( ≥ DN300) If resistance to intergranular corrosion is required, the application temperature must not exceed 300 ° C. Subject to changes 43 / 61 Version 10 • DocID 73998091 Internet: www.gefa.com • E-Mail: gefa@gefa.com...
Page 45
Sealing tape PTFE PTFE Graphite Graphite Graphite Graphite If resistance to intergranular corrosion is required, the application temperature must not exceed 300 ° C. Subject to changes 45 / 61 Version 10 • DocID 73998091 Internet: www.gefa.com • E-Mail: gefa@gefa.com...
Page 47
(≥ DN700) (≥ DN700) (≥ DN700) (≥ DN700) If resistance to intergranular corrosion is required, the application temperature must not exceed 300 ° C. Subject to changes 47 / 61 Version 10 • DocID 73998091 Internet: www.gefa.com • E-Mail: gefa@gefa.com...
Page 49
Hexagon screw A2-70 A2-70 A2-70 A2-70 A2-70 A2-70 If resistance to intergranular corrosion is required, the application temperature must not exceed 300 ° C. Subject to changes 49 / 61 Version 10 • DocID 73998091 Internet: www.gefa.com • E-Mail: gefa@gefa.com...
Page 51
PTFE 1.20 Sealing tape Graphite Graphite Graphite Graphite If resistance to intergranular corrosion is required, the application temperature must not exceed 300 ° C. Subject to changes 51 / 61 Version 10 • DocID 73998091 Internet: www.gefa.com • E-Mail: gefa@gefa.com...
Page 53
(≥ DN700) (≥ DN700) (≥ DN700) (≥ DN700) If resistance to intergranular corrosion is required, the application temperature must not exceed 300 ° C. Subject to changes 53 / 61 Version 10 • DocID 73998091 Internet: www.gefa.com • E-Mail: gefa@gefa.com...
Metal seat DIN 3230-BO2 > 2 Seat Leakage EN 12266-P12 > B PTFE seat and similar materials DIN 3230-BO2 > 1 Seat Leakage EN 12266-B12 > A 54 / 61 Version 10 • DocID 73998091 Internet: www.gefa.com • E-Mail: gefa@gefa.com...
Metal seat DIN 3230-BO2 > 2 Seat Leakage EN 12266-P12 > B PTFE seat and similar materials DIN 3230-BO2 > 1 Seat Leakage EN 12266-B12 > A 55 / 61 Version 10 • DocID 73998091 Internet: www.gefa.com • E-Mail: gefa@gefa.com...
Metal seat DIN 3230-BO2 > 2 Seat Leakage EN 12266-P12 > B PTFE seat and similar materials DIN 3230-BO2 > 1 Seat Leakage EN 12266-B12 > A 56 / 61 Version 10 • DocID 73998091 Internet: www.gefa.com • E-Mail: gefa@gefa.com...
- Check whether the limit switch is defective or misaligned Replace actuator if necessary. Remove and clean the valve, if necessary replace defective parts ac- Valve clogged or damaged cording to the instructions of the manufacturer. 57 / 61 Version 10 • DocID 73998091 Internet: www.gefa.com • E-Mail: gefa@gefa.com...
Page 58
When returning the product to the manufacturer, enclose the safety data sheet of the media. Furthermore, if ne- cessary, it must be stated which safety measures have to be observed when handling the returned product. 58 / 61 Version 10 • DocID 73998091 Internet: www.gefa.com • E-Mail: gefa@gefa.com...
Remove attached actuators before removing the valve or secure them against unauthorized use and accidental operation. 59 / 61 Version 10 • DocID 73998091 Internet: www.gefa.com • E-Mail: gefa@gefa.com...
Page 60
After the switching operation has been completed, the position of the hand lever is to be secured by tightening the star knob. 60 / 61 Version 10 • DocID 73998091 Internet: www.gefa.com • E-Mail: gefa@gefa.com...
If required, push the square adapter (2.5) onto the shaft. If necessary, use the enclosed retaining ring to en- sure that the square adapter will not slip off the shaft (2.4). 61 / 61 Version 10 • DocID 73998091 Internet: www.gefa.com • E-Mail: gefa@gefa.com...
Need help?
Do you have a question about the HG7 and is the answer not in the manual?
Questions and answers