| 421AK00280C | NO CONTROL SPECIAL FEATURES | THIRD DESIGN | 41.0 cm3/r [2.50 in3/r] | M27 X 2 METRIC O-RING PORT - TOP | NO FLOW COMPENSATOR SETTING |
| 421AK00275B | NO CONTROL SPECIAL FEATURES | Second Design | 49.2 cm3/r [3.00 in3/r] | M27 X 2 METRIC O-RING PORT - TOP | NO FLOW COMPENSATOR SETTING |
| 421AK00273C | BLEED DOWN ORIFICE | THIRD DESIGN | 62.3 cm3/r [3.80 in3/r] | 1.0625-12 UNF-2B O-RING PORT - TOP | 12.41-15.17 bar [180-220 lbf/in2] |
| 421AK00272C | BLEED DOWN ORIFICE | THIRD DESIGN | 62.3 cm3/r [3.80 in3/r] | 1.0625-12 UNF-2B O-RING PORT - TOP | 12.41-15.17 bar [180-220 lbf/in2] |
| 421AK00263C | NO CONTROL SPECIAL FEATURES | THIRD DESIGN | 49.2 cm3/r [3.00 in3/r] | 1.0625-12 UNF-2B O-RING PORT - TOP | 12.41-15.17 bar [180-220 lbf/in2] |
| 421AK00256C | NO CONTROL SPECIAL FEATURES | THIRD DESIGN | 41.0 cm3/r [2.50 in3/r] | 1.0625-12 UNF-2B O-RING PORT - TOP | 12.41-15.17 bar [180-220 lbf/in2] |
| 421AK00250C | NO CONTROL SPECIAL FEATURES | THIRD DESIGN | 41.0 cm3/r [2.50 in3/r] | 1.0625-12 UNF-2B O-RING PORT - TOP | 12.41-15.17 bar [180-220 lbf/in2] |
| 421AK00249C | NO CONTROL SPECIAL FEATURES | THIRD DESIGN | 41.0 cm3/r [2.50 in3/r] | 1.0625-12 UNF-2B O-RING PORT - TOP | 12.41-15.17 bar [180-220 lbf/in2] |
| 421AK00247C | NO CONTROL SPECIAL FEATURES | THIRD DESIGN | 41.0 cm3/r [2.50 in3/r] | 1.0625-12 UNF-2B O-RING PORT - TOP | 12.41-15.17 bar [180-220 lbf/in2] |
| 421AK00241C | BLEED DOWN ORIFICE | THIRD DESIGN | 62.3 cm3/r [3.80 in3/r] | 1.0625-12 UNF-2B O-RING PORT - TOP | 12.41-15.17 bar [180-220 lbf/in2] |
| 421AK00208C | NO CONTROL SPECIAL FEATURES | THIRD DESIGN | 49.2 cm3/r [3.00 in3/r] | 1.0625-12 UNF-2B O-RING PORT - TOP | 9.65-12.41 bar [140-180 lbf/in2] |