User manual GEORG FISCHER DN@50

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Manual abstract: user guide GEORG FISCHER DN@50

Detailed instructions for use are in the User's Guide.

[. . . ] Valve Design g) h) i) a) b) c) d) e) f) g) h) i) Visual position indicator All-plastic housing of PP-GF Pre-tensioned spring sets Stroke spindle assembly of stainless steel Diaphragm plate Control diaphragm NAMUR interface Sealing diaphragm EPDM or PTFE Valve body of PVC-U, PP or PVDF GEORGE FISCHER . . . 36 3. Installation Information Valves should be mounted as firmly as possible, i. e. Any active force is then transmitted directly and not through the pipeline. The threaded sleeves on the diaphragm valve are ideal for this purpose. [. . . ] Remove indicator cap and indicator pin from the basic version (see Section 2). Attention: indicator pin has left thread) 3. Screw threaded bush with @9 mm wrench tightly into the actuator. Screw locknut on threaded bush and secure with a 4@ mm wrench. Guide indicator pin through threaded bush, screw into spindle nut and secure with a 6 mm Allen wrench. Screw indicator cap onto locknut. 42 GEORGE FISCHER . . . Adjustments 1. Minimum Flow Adjustment (DN65­DN80, FC, FO, DA) Put valve in position <open> using the control medium (FC, DA). Remove locknut with a 4@ mm wrench and turn the threaded bush with a @9 mm wrench in a counterclockwise direction until the desired position is reached. The stroke limit setting can be determined by comparing the position of the threaded bush to the basic setting. Maximum Flow Adjustment (DN65­DN150, FC, FO, DA) Put valve in position <closed> using the control medium. Remove locknut with a 4@ mm wrench and turn the threaded bush with a @9 mm wrench in a clockwise direction until the desired position is reached. The stroke limit setting can be determined by comparing the position of the threaded bush to the basic setting. Emergency Manual Override (DN65­DN80) The adjustment is similar to that for the stroke limiter. By turning the threaded bush in a clockwise direction, the valve is closed (FO/DA); by turning it in a counterclockwise direction, the valve is opened (FC / DA). For automatic operation, the valve must be reset according to the instructions in Section 7. 1. GEORGE FISCHER . . . 43 8. Replacing the Diaphragms 8. 1 Removing the Sealing Diaphragm As in any diaphragm valve, the component with the most wear and tear is the diaphragm. In addition to mechanical stress, the diaphragm is subject to wear resulting from the flow media. We urgently recommend that the diaphragm is inspected after 50 , 000 cycles. If the flow media is muddy or contains abrasive particles, we recommend more frequent inspections. The diaphragm can be inspected by dismantling the valve body. To this end, remove the screws attaching the base to the valve body. Elastomer diaphragms are retained by a threaded bolt and can be removed by turning it in a counterclockwise direction. [. . . ] +32(0)2/556 40 20, Fax +32(0)2/524 34 26, e-mail: info. be@be. piping. georgfischer. com Georg Fischer Rohrleitungssysteme (Schweiz) AG, Amsler-Laffon-Strasse ¢, Postfach, 8201 Schaffhausen Tel. +41(0)52/631 30 26, Fax +41(0)52/631 28 97, e-mail: info@rohrleitungssysteme. georgfischer. ch Georg Fischer Piping Systems Ltd. 2Ý8 Kang Qiao Dong Rd. , Shanghai 201319 Tel. +86(0)2¢/58 13 33 33, Fax +86(0)2¢/58 13 33 66, e-mail: gfsro@public. shanghai. cngb. com Georg Fischer GmbH, Daimlerstraße 6, 73095 Albershausen Tel. [. . . ]

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