Mechanical Seals:

• These models incorporate mechanical seals on both the rotor shafts and the drive shaft.
• They have flanged port fittings, water-cooled drive shaft seals, and cooling coils in the end covers.
• Water-cooled seals are not included with the optional motor mounting flange versions.

Slinger Seals:

• These models use a mechanical drive shaft seal combined with a non-contacting, non-wearing slinger seal on the rotor shafts.
• They also feature water-cooled drive shaft seals and flanged port fittings.
• Cooling coils are not included in these versions.
• Water-cooled drive shaft seal is excluded with optional motor mounting flange versions.

Noise Level:

• These vacuum boosters are designed to operate at a low noise level, with an operating sound of 82 dB(A) or less at blank-off.

Materials:

• Standard materials include cast iron for the housing, end plates, and end covers, with ductile iron rotors and shafts.
• Special materials such as stainless steel, carbon steel, or ductile iron are available for certain models.
• The Bi-Protec® coating option provides a special Nickel/Armoloy® finish.

Optional Motor Mounting Flanges:

• The vacuum booster models can be fitted with flange adapters to mount a NEMA C-face motor (up to 75 HP) or an IEC D-flange motor (up to 55 kW) directly to the booster. This eliminates the need for a separate base-mounted assembly and coupling guard.

Metric Availability:

• These vacuum boosters are available with metric drive shafts and process connections.

Special Testing:

• The vacuum boosters undergo special testing, including:
  • ASME PTC-9 (1 PSIG slip method).
  • Hydrostatic testing up to 150 PSIG (10.35 bar g).
  • Pressure gas testing up to 100 PSIG (6.9 bar g).
  • Seal leakage testing.