Sigma pneumatic, hydraulic, fusible devices, and pressure sensing pilots equip safety and environmentally conscious automation systems in the oilfield, aerospace and pharmaceutical industries worldwide.
For more information about Sigma Valves, visit www.sigma-valves.com
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The Sigma 20HM27 is a two position, two-way normally closed, Pilot Supply pressure operated hydraulic flow control valve assembly. It is designed to establish internal hydraulic Supply to Exhaust flow automatically with the application of relatively low Pilot Supply pressure.
Hydraulic Interface Valve Features and BenefitsDownload hydraulic interface valve brochure 
The Sigma 72KS25 is a two position, three-way block and bleed (universally ported) pressure monitoring Flow Line Pilot. It can be connected to respond as either a High (rising/increasing) or Low (falling/decreasing) pressure sensing device. In the Pressure Safety High (PSH) application, the Pilot is designed to lose instrument supply output whenever the high-pressure setting is exceeded.
Download pressure sensor brochure
The Sigma 13QS1 is a two position, Flapper Seal operated, high flow exhaust control valve assembly. It establishes flow (from the inlet to outlet or Supply-to-Valve connections) to
open a Surface Safety Valve (SSV or pneumatic Actuator), automatically with each application of operating pressure.
A loss or significant decrease of operating pressure will unseat the Flapper Seal quickly to establish high volume, reverse or Exhaust flow. Rapid closure of an Actuator valve is assured with the use of a Quick Exhaust Valve.
Download quick exhaust valve brochure
The Sigma 28RG24 is a two position, pressure reducing (spring/sensing piston modulating combination), flow control valve. Pressure Regulators are typically used to reduce source or instrument supply pressure from up to 6,000 PSI to a specific lower operating pressure, generally from 30-150 PSI.
Hydraulic Regulator Features and BenefitsDownload hydraulic regulator brochure
