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FLOW-ADJUST

FLOW-ADJUST
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Standard and high resolution manual control valves for extremely precise control in low flow > Introduction Bronkhorst High-Tech B.V., the European market leader in thermal Mass Flow Meters/Controllers and Electronic Pressure Controllers, has over 30 years experience in designing and manufacturing precise and reliable measurement and control devices. With a wide range of instruments, Bronkhorst High-Tech offers innovative solutions for many different applications in many different markets. > Description The new FLOW-ADJUST manual control valves are designed for extremely precise control in low flow gas and liquid applications. The manual control valves are available in two standard resolution (SR) and five high resolution (HR) models offering a smooth control of gas or liquid flow. The standard resolution needle valves cover the two highest flow ranges whereas the high resolution valves cover the lower gas and liquid flow ranges. The FLOW-ADJUST series control the flow of gases and liquids which are compatible with the wetted parts specified in this leaflet. Kv ranges from 2.7x10-4 to 9.0x10-2 are available (Cv equivalent 3.2x10-4 to 1.05x10-1) in 7 different models as in-line valve assemblies with G ¼” BSPP female inlet and outlet ports. u ompact needle valve in aluminium housing C u eak-free valve L u recise flow adjustment with 7-turn standard resolution P u alve knob included for easy adjustment V u wo M4 female threads in the bottom of the housing for T solid fixation u uitable for gases and liquids S > Features of HR valve (additional to SR) u pring loaded, non rising adjustment stem with 56-pitch S thread provides smooth, non-reversing flow characteristics and 15-turn high resolution u on-rotating stainless steel valve pin with precision ground N flat gives exact control u alve pin o-ring guarantees positive shut-off without stem V damage u elf-lubricating orifice liner assures long life S

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> Capacity based on Air (typical p1=1 bar(g), p2=0 bar(g), p1=14.5 psi(g), p2=0 psi(g)) Pressure rating Temperature rating Mechanical specifications Connections (in/out) Materials (wetted parts) Body Valve needle holder : Brass with Fluorosint® liner Pressure [bar(g)] Leak integrity Each valve is thoroughly tested to a bubble tight leak < 1 x 10-4 mbar l/s He1 Note: excessive force used to achieve positive shut-off can deform or score the sealing surface in the valve 1 tested with new unused needle valves > Capacity based on Water (typical p1=1 bar(g), p2=0 bar(g), p1=14.5 psi(g), p2=0...

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