CAIRE COMPANION 1000 Technical Manual

Contents

CAIRE COMPANION 1000 Technical Manual Manual pdf 60 page image

Companion 1000/T Liquid Oxygen System Technical Manual5-12 Service and Repair B-701964-00 Rev. C5.7.2 Installation1. Install the primary relief valve by reversing the removal procedure (Section 5.7.1).5.8 SECONDARY RELIEF VALVEThe secondary relief valve is a poppet-type, pressure-regulating valve that acts as asafety backup in the event that the primary relief valve fails to limit system pressure toan acceptable range. Under normal operating conditions, the secondary relief valveremains closed. The secondary relief valve is not field serviceable. If it is not operatingproperly, replace it.5.8.1 RemovalRefer to Figure 6-6 to identify parts with bold number references.1. Remove side cover B (Section 5.2.1, steps 1 and 2).2. Use a 1/2-in. open-end wrench to loosen the 3/16-in. tube nut 4 connected between thesecondary relief valve 1 and the secondary relief valve adaptor 2. Simultaneously,hold the relief valve adapter stationary with another 1/2-in. open-end wrench whileremoving the secondary relief valve.5.8.2 Installation1. Install the secondary relief valve by reversing the removal procedure (Section 5.8.1).5.9 VENT VALVEThe vent valve is a lever-operated, poppet-type valve that you open to begin aCompanion 1000/T fill and close to terminate the fill. Service to the valve is limited toreplacing the valve lever and lever pin.5.9.1 RemovalRefer to Figures 6-1 or 6-2 and 6-7 to identify parts with bold number references.1. Remove the side covers by following the side cover removal procedure (Section5.2.1).2. Use a 9/16-in. open-end wrench to disconnect the 1/4-in. tube nut 2 that connects thevent extension tube 9 to the vent valve 10 (Figure 5-15).Before installing the relief valve, wrap the relief valve threads with Teflon tape,starting two threads back from the end.Before installing the secondary relief valve assembly, wrap the relief valvethreads with Teflon tape, starting two threads back from the end.