ANDERSON GREENWOOD 4142HF PRESSURE RELIEF VALVE INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS Before installation, these instructions must be carefully read and understood. TABLE OF CONTENTS Tables and Figures 1. Safety Precautions ........2 2. General Descriptions ........2 Table 1 Seat Lap Band Width ....... 6 3.
3 OPERATION Read and understand this instruction manual The Anderson Greenwood 4142HF PRV is The Anderson Greenwood 4142HF PRV is a before installing, operating or performing employed in gas/vapour service applications direct acting vent valve based on the weight of...
ANDERSON GREENWOOD 4142HF PRESSURE RELIEF VALVE INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS 4 SET PRESSURE VERIFICATION 4.2 Set Pressure Adjustment (See Figure 1) 5 INSTALLATION The valve has been factory set to the required If the pressure setting is to be verified prior to...
ANDERSON GREENWOOD 4142HF PRESSURE RELIEF VALVE INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS 6 MAINTENANCE 6.2 Pallet Assemblies (For reference numbers, see Figure 2) Regular inspection should be carried out to ensure that the pressure port is free from 1. VLP/LP Pallet assembly 2”, 3”, 4”...
ANDERSON GREENWOOD 4142HF PRESSURE RELIEF VALVE INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS PARTS LIST FIGURE 1 Item No. Description Valve General Assembly Upper Body Cover Seat Assembly Seat Vacuum Post O-ring Shroud Capscrew Washer Body Gasket Hex Set Screw O-ring Inlet Flange...
ANDERSON GREENWOOD 4142HF PRESSURE RELIEF VALVE INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS 6.3 Valve Refurbishment TABLE 1 - SEAT LAP BANDWIDTHS With valve in component parts thoroughly clean Valve Size, Nominal Width Max Width all surfaces with a suitable solvent and check In.
ANDERSON GREENWOOD 4142HF PRESSURE RELIEF VALVE INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS 7 TESTING SET PRESSURE The pressure setting should be checked and if necessary adjusted as described in section 4. VLP / LP PALLET 2", 3" AND 4" HP PALLET 2", 3", 4" AND 6"...