Edwards Stokes Microvac 412JPumping speed 442 m³/hUltimate pressure 0.033 mbar
Edwards Stokes Microvac 212J 3Ph 230/460 V 60 Hz, NEMA motor 7.5 hp, coil 230/460 V
The Edwards Stokes Microvac 212J is an oil-sealed rotary piston vacuum pump with a pumping speed of 234 m³/h and an ultimate pressure below 0.033 mbar. The low speed of 500 min⁻¹ ensures a long service life. Ehrler & Beck advises on selection and service.
Request a quote for this product Read more
- Pumping speed 234 m³/h 50 Hz 234 m³/h 60 Hz
- Ultimate pressure 0.033 mbar
| Variant | Part number |
|---|---|
| 3Ph 230/460 V 60 Hz, NEMA motor 7.5 hp, coil 230/460 V (selected) | 900-212-014 |
| 3Ph 200/208 V 60 Hz | 913-212-014 |
| 3Ph 230/460 V 60 Hz, explosion-proof Class 1 Div 1 Group C&D (North America) | 916-212-014 |
| 3Ph 575 V 60 Hz, CSA (Canada) | 919-212-014 |
| 3Ph 380 V 50 Hz, without CE marking | 924-212-014 |
| 3Ph 230/460 V 60 Hz, coil 115 V | 931-212-014 |
| 3Ph 380 V 60 Hz | 945-212-014 |
| 3Ph 230/460 V 60 Hz, with Water Miser (cooling water saver), coil 230/460 V | 970-212-014 |
Edwards Stokes Microvac 212J – rotary piston vacuum pump from the Stokes Microvac series
The Stokes Microvac pumps have been in use for more than 80 years. The Stokes Microvac 212J delivers 234 m³/h and reaches an ultimate pressure below 0.033 mbar; at 500 min⁻¹ it runs slowly and is correspondingly long-lived. The pump is water-cooled and weighs around 431 kg.Features
- Robust design in grey and ductile cast iron
- Few moving parts and large clearances for high availability
- Automatic lubrication of bearings and sealing surfaces with backflow barrier
- Gas ballast as standard
- Easy to maintain on site; compact footprint
- Controlled balancing for low vibration
Operating limits
Edwards approves the Microvac pumps only for air, nitrogen and other inert gases. Oxygen, hydrogen and chemically active, corrosive or flammable gases must not be pumped.Typical applications
Edwards names, among others, the automotive industry, metallurgy, vacuum coating, vacuum melting, chemical processing, heat treatment, leak detection, PET processing, pharmaceuticals and transformer drying.Versions
The versions listed in the Edwards webshop are mostly 60 Hz versions with NEMA motors; one 380 V 50 Hz version is expressly without CE marking. The operating instructions list CE-marked pumps with IEC motor (200/400 V 50 Hz) under separate part numbers – please ask Ehrler & Beck.Advice and service
Ehrler & Beck supports you in selection, supplies oil and spare parts and carries out maintenance and repair.| Pumping speed 50Hz | 234 |
|---|---|
| Pumping speed 60Hz | 234 |
| Ultimate pressure | 0.033 |
| Weight | 431 |
| Height | 117.1 |
| Inlet connection flange | 3" ANSI |
| Outlet connection flange | 2" NPT/flange |
| Noise level | 77 dB(A) |
| Cooling method | Water cooling |
| Oil type | V-Lube F |
Additional technical data
| Technical data | Value |
|---|---|
| Design | Oil-sealed rotary piston vacuum pump, water-cooled, belt drive |
| Max. pumping speed | 234 m³/h |
| Pumping capacity (displacement) | 255 m³/h (150 cfm) |
| Ultimate pressure | < 0.033 mbar (< 25 µm Hg) |
| Pump speed | 500 min⁻¹ |
| Motor | NEMA motor 230/460 V 60 Hz: 7.5 hp; IEC motor 200/400 V 50 Hz (CE pumps): 5.5 kW |
| Sound pressure level (1 m, ultimate pressure) | < 77 dB(A) |
| Connections | Inlet 3" ANSI, outlet 2" NPT/flange |
| Cooling water | max. 5.7 l/min, inlet temperature max. 30 °C, connections ½" NPT |
| Oil | V-Lube F (normal operation), V-Lube G (operating temperature above 71 °C); filling 15 l |
| Weight (net) | 431 kg |
| Footprint / height | 667 × 610 mm / 1171 mm |
| Ambient temperature | 12 to 40 °C |
| Use | only for air, nitrogen and other inert gases; not for oxygen, hydrogen or chemically active, corrosive or flammable gases |
Edwards Stokes Microvac 412JPumping speed 442 m³/hUltimate pressure 0.033 mbar