Pulsafeeder PulsaPro 900 EN - Manual (Page 32)

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7.3.4 Check Valve Reinstallation
1. Reinstall both valve assemblies, taking care to ensure that they are correctly oriented with balls
or disks above seats. Refer to Figure 14.
2. Tighten the tie bar bolts evenly, making sure the valve assemblies and tie bar are assembled
squarely. Refer to Appendix III for torque values.
For best results, always loosen the unions or flanges on either side of the system piping prior
to re-tightening the check valve assemblies. Retighten the unions or flanges after the check
valves are securely tightened into position.
3. Check for leaks and retighten tie bar bolts as necessary.