Related Manuals for McElroy T-900
Summarization of Contents
Hydraulic Manifold Block Components
Carriage Control Valve
Controls carriage movement direction (left, right, neutral).
Pressure Gauge
Indicates system pressure on the manifold block.
Selector Valve
Selects pressure from reducing valves for specific functions.
Facing Pressure Adjustment
Top valve adjusts facing pressure, typically 3-7 Bar (50-100 psi).
Heating Pressure Adjustment
Middle valve adjusts heating pressure, often set to 0 Bar.
Fusion Pressure Adjustment
Bottom valve adjusts fusion pressure, which must be determined.
Fusion Pressure Calculation
Using the Fusion Pressure Calculator
Step-by-step guide for using the calculator.
Fusion Pressure Variables and Formula
Defines terms and presents the formula for calculating gauge pressure.
Heating The Pipe
Initial Pipe Contact with Heater
Move carriage left, seating pipe ends against heater.
Pressure Stabilization for Heating
Move selector to center, stabilize pressure at lowest setting.
Heating Phase Preparation
Return carriage to neutral for heating at low pressure.
Fusing The Pipe
Prepare for Fusion
Shift carriage control to neutral position.
Engage Fusion Position
Shift selector valve down to fusion position.
Heater Removal
Move carriage right to remove heater.
Apply Fusion Pressure
Inspect ends, shift carriage left, apply fusion pressure.
Cooling Of The Fusion Joint
Cooling by Touch Verification
Cool until touchable, checking with a tool.
Cooling Time Guidelines
Cooling time based on wall thickness at 23°C.
Temperature-Based Cooling Check
Measure weld bead temp against pipe temp.
Butt Fusion Joint Troubleshooting Guide
Inspection of Fusion Joint Quality
Guideline for checking fusion bead quality and dimensions.
Required Joint Conditions
No cracks, minimal ovality offset (<10%), no cleavage below surface.
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