Volm Two-Stage Liquid Ring Vacuum Pumps Empower Efficient and Stable PVC Production

1.Efficiency Drop in High Vacuum

• Single-stage pumps exhibit plummeting pumping speeds and surging energy consumption when operating below 20 kPa(A), failing to meet high-flow requirements for drying processes. In contrast, two-stage pumps’ efficiency in high-vacuum operations exceeds single-stage pumps by 35~40%, with proportionally lower energy consumption. Selecting vacuum pumps tailored to specific operating conditions is therefore essential for cost-effective operation.

Remarks: working liquid is 20℃ water, and atmospheric pressure is 101.3kPa.

2.Particle Clogging Risks

• Residual vinyl chloride monomer particles (50~100μm) may clog liquid circuits, triggering unplanned downtime.

3.High-Pressure Sealing Challenges

• Barrier fluid suction pressure for double mechanical seals reaches 0.7 MPa. Manual pressure regulation risks seal failure and leakage.

1. Two-Stage Pump Design

• Patented 2BE1S Series divides 1:10 compression ratio into two 1:5 stages;

• Inter-stage flow channels optimize gas paths → 40% higher pumping speed at 5 kPa(A), with efficiency increase from 25% to 45%, and 10% energy savings;

• Saves ¥96,000/year in drying alone (800 m³/h at 10 kPa(A)).

2. Anti-Clogging Intelligent System

• Dual self-cleaning filters (50μm precision) + remote electromagnetic flowmeters;

• PLC auto-switches to backup filter & -sends clogging alert, at <80% flow with zero downtime.

3. Self-Regulating High-Pressure Seals

• Self-acting control valves stabilize barrier fluid pressure at 0.3 MPa (which is optimal for seals).