 |
| 1980 |
|
Begin manufacturing of the MK78 Globe Style Control Valves |
| 1981 |
|
Begin manufacturing of the MK89 3-way Sliding Gate Temperature Regulators |
| 1982 |
|
Begin manufacturing of MK501/601 High Flow Pressure Regulators |
| 1983 |
|
Begin manufacturing of the MK68 Globe Style Press Regulators |
| 1984 |
|
Begin manufacturing of the MK707 Equal Percentage Sliding Gate Valve |
| 1985 |
|
Richards Industries purchases Hex Valve Gauge & Manifold Line |
| 1986 |
|
Begin manufacturing of the MK608 Low Pressure Gas Regulator |
| 1987 |
|
Begin manufacturing the MK708 Low Flow R & D valves |
| 1988 |
|
Begin manufacturing the MK8000 Uniflow Fractional Flow Control Valve |
| 1990 |
|
Hex Valve introduces the HG47 roddable hard seat valve |
| 1991 |
|
Begin manufacturing the first sanitary valve - the MK96 |
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