Norriseal-Wellmark

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Established in 1981, WellMark LLC initially began business with a single product line, a cantilever-style liquid level control. Currently, it produces a comprehensive range of liquid and pneumatic controls/valves. Over the years, the firm has expanded its offering, adding several other oil/gas production-related products. It provides products, such as hydrostatic headswitches, electric level controls, pneumatic level controls, safety relief valves, pressure-reducing regulators, backpressure regulators and chemical injection pumps. In addition, the company offers diaphragm-operated motor valves, throttling/choke valves and mechanical dump controls/valves.