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ambient API Spec 11V1 Appendix bellows assembly bellows replacement change 5 psi check valve closing pressure DATE INSPECTED/TESTED degF disassembly elastomers FIELD DATE GAS INLET PORTS gas lift valve gas pressure Hydrostatic Aging Tests INCHES Install leak free LETTERS PATENT mended Practice NUMBER O-rings opening pressure Pvo OPERATOR WELL NAME ORDER PULLED original manufacturer's pressure chamber pressure has changed pressure or closing Put the valve Pvct rack opening pressure reassembly procedure REBUILT VALVES Recommended Practice Remove the valves repair shop written repair shop's reverse flow check REVERSE FLOW VALVES SAND RUST MUD SCALE PARAFFIN CEMENT SECTION B3 SERVICE/VALVE REPAIR COMPANY set pressure snap rings solvent Spec 11VI specifications spring loaded valves square edged seat std cu ft/day stem and seat stem travel temperature test rack opening Test valve TESTER FIGURE threads TOP PACKING VALVE BODY CONDITION valve core valve stem valves and reverse Visually inspect water bath wireline written procedures