Nitrogen (N2) Maintenance: Checking & Refilling Guide

I. Nitrogen Standards & Inspection

1. Standard Pressure: Refer to the Table below for model-specific pressure settings at room temperature.

2. Initial Check: Every SLYM breaker is pre-set at the factory, but pressure must be verified before the first operation.

3. Frequency: 

• Back Head: Inspect every 2 weeks.

• Accumulator: Inspect every month (Standard: 55-60 Bar).

  
  

The pressure range of nitrogen chamber, accumulator and overflow valve

Table 

II. How to Check N₂ Pressure

1. Setup: Remove the valve cap (counter-clockwise). Secure the 3-way nitrogen gauge, tighten the nut, and ensure the bleed valve is closed.

2. How to Check Nitrogen Pressure (Refer to the diagram)

• For Back Head

1) Preparation: Remove the nitrogen valve cap from the back head (counter-clockwise). Tighten the 3-way valve (clockwise) and ensure the nitrogen gauge nut is secured. Close the bleed valve (relief valve).

2) Reading the Gauge: Use your palm to press down the switch on the 3-way valve. Observe the reading on the pressure gauge.

3) Adjusting Over-pressure: If the N₂ reading is too high, slowly open the bleed valve on the 3-way valve to discharge gas until the pressure reaches the standard specification.

• For Accumulator:

1) Preparation: Unscrew the plug (⑨) on the accumulator counter-clockwise. Tighten the nitrogen gauge (clockwise), ensure the nut connection is secure, and verify the bleed valve (relief valve) is closed.

2) Accessing the Valve: Unscrew the accumulator cap nut (⑪) counter-clockwise. Slowly turn the charging valve counter-clockwise until the needle on the nitrogen gauge begins to move.

3)Reading & Adjusting: Observe the gauge reading. If the pressure exceeds the 60-bar limit, slowly open the bleed valve on the gauge to discharge excess gas until it reaches the standard range.

4) Securing: Close the charging valve (clockwise) and securely tighten the cap nut (⑪).