Questions and Answers for ScubaPro MK2 Plus DIN Regulator - 1st Stage Only:
What is the difference between the MK2, MK17, and the MK25?
Bill (Certified Scuba Instructor at Scuba.com)
The MK2 is a standard unbalanced first stage. The MK 17 is seal diaphragm, balanced first stage and the MK 25 is a piston balanced first stage. The MK 25 is the highest performing regulator of the three.
Technical Information MK2 Plus First Stage Classic downstream piston Chrome plated brass body Low pressure ports: 4 High pressure ports: 1 Tank connection: INT 230 bar / DIN 300 bar Weight: : INT 230 706 / 24.9 - DIN 300 485g / 17.1oz Air Flow at 200bar: 2600 l/min - 92 SCFM Intermediate pressure (bar/psi): 8.5-9.8 / 123-142