MB-21
General
| Housing body | Cast aluminum |
| Bellows | AM-350 stainless steel |
| All other wetted surfaces | 300 Series Stainless Steel except for Valve Assembly; Teflon® Valve Gaskets; Viton® O-Rings |
| Bearings | Permanently lubricated ball type |
| Weight | 6 lbs (7.2 lbs for MB-21E) |
| Port connections | 1/8" NPT |
Electrical
| Standard | 115V (220V/240V for MB-21E) 50/60Hz |
| Current at 115V/60Hz | 2.3 Amps (max) |
| Motor specification | 1/40 HP Shaded Pole induction motor with ball bearings and thermal overload protection (Permanent Capacitor Induction Type for MB-21E) |
| Operating speed @ 60 Hz | 2500 RPM (3400 RPM for MB-21E) |
| Insulation | Class B (Class F for MB-21E) |
MB-21
Product DrawingSenior PN: 28649, 40895, 28662-100
| Product Options | Senior PN |
| MB-21 – TEFLON VALVE | 28649 |
| MB-21 – VITON VALVE | 40895 |
| MB-21 – NEW COVER | 28662-100 |
MB-21 3W
Product DrawingSenior PN: 28825
| Product Options | Senior PN |
| MB-21 3W – 3 WIRE CORD NO FUSE | 28825 |
MB-21E
Product DrawingSenior PN: 48725, 48725-1, 48725-2
| Product Options | Senior PN |
| MB-21E – 240V, 50 Hz TEFLON VALVE | 48725 |
| MB-21E – 240V, 50 Hz VITON VALVE | 48725-1 |
| MB-21E – 240V, 50 Hz TEFLON VALVE W/O MOTOR | 48725-2 |