Abstract: A compressor comprising a compressor housing including a cylinder block forming seven cylinders equiangularly spaced apart and extending axially therein. Each of the cylinders is slidably fitted with a piston, and a drive mechanism is coupled to the pistons to reciprocate them within the cylinders to create fluid suction and discharge. The drive mechanism includes a drive shaft rotatably supported in the housing and coupling means for converting the rotary motion of the drive shaft to reciprocating motion of the pistons. The coupling means may also include a rotor coupled to the drive shaft and a slant plate having a surface disposed at an inclined angle relative to the drive shaft. A valve plate fabricated from steel having a hardness in a range of about 120 to 450 Hv seals the cylinders, such that fluid is compressed between each of the pistons and the valve plate.