Pressure Tech LF Series – Low Flow Regulators
Pressure Tech LF Series – Low Flow Regulators
The LF Series is a family of low-flow regulators designed for precise pressure control of gases and liquids. Available in diaphragm-sensed and piston-sensed versions, these regulators cover a wide range of pressures, materials, and seating options to suit analyser, instrument, hydraulic, and ultra-high-pressure applications.
Why it matters
Accurate regulation at low flow is critical to protecting sensitive analysers and instrumentation, ensuring compliance, and supporting reliable operations. With models capable of handling aggressive fluids, extreme pressures, or compact installation requirements, the LF Series provides dependable control across diverse service conditions.
Product features
- Diaphragm-sensed or piston-sensed options
- Balanced or unbalanced valve designs depending on model
- Cv options from 0.06 to 0.2 (model dependent)
- Compact and lightweight models available for restricted spaces
- Ceramic seating for hydraulic and water-glycol applications
- Tecasint® seat option for ultra-high-pressure gas service
- Captured vent designs to protect loading mechanisms
- Options for self-venting or non-venting operation
Models
- LF240: single-stage, diaphragm-sensed regulator with elastomeric diaphragm for accurate low-pressure gas control datasheet
- LF310: diaphragm-sensed regulator with Inconel® X750 diaphragm for aggressive or high-temperature service datasheet
- LF311: piston-sensed regulator for higher supply pressures and long lifecycle performance datasheet
- LF540: compact, economical piston-sensed regulator with precision-machined sensing elements datasheet
- LF690: piston-sensed regulator with ceramic seat for hydraulic and water-glycol service datasheet
- LF691: piston-sensed regulator with ceramic seat and plug design for pressures above 690 bar (10,000 psi) datasheet
- LF792: piston-sensed regulator with Tecasint® seat for ultra-high-pressure gas service (to 1,034 bar / 15,000 psi) datasheet
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