Instruction manual Maintenance4111.1 Replacing diaphragm and O-ring Remove the valve from the pipeline and bring it into horizontal position.11.1.1 Disassembly Prior to dismantling: Mark the position of bonnet assembly (top part) to body on thehousing. Remove the cap from the bonnet assembly (top part), see Fig. 2. To do so, use a screwdriver. Relax the spring. To do so, turn the spindle counterclockwise (P-), up to the end position. Fix the body with a suited tool and loosen the bonnet assembly (top part). To do so, turnthe bonnet assembly (top part) counterclockwise, see Fig. 7. During this, the seal stickerwill be broken.Fig. 7 Remove Pressure piece, springs and retaining ring, see Fig. 8 Optional version 0.3 - 3 bar (4 - 44 psi): one springFig. 8