Switches - Flow
NF265 & NF282 Flow SwitchesLINC Level Switch
Features: The Linc NF265 & NF282 flow indicators are used to monitor flow/no flow. The electric or pneumatic output is used to alarm, operate valves, control pumps or perform any desired electrical or pneumatic function.
NF265 Electric: SPST (SPDT optional), 100 V.A. AC, 100W DC, 3 amp inrush capability, maximum 250 Volts, Hermetically sealed
NF282 Pneumatic: 0 to full supply pressure
Working Pressure: 5,000 psi
Temperature: -40ºF to + 400ºF standard, with 500ºF optional for NF265 model only
Materials: 316 stainless steel is standard, available in other austenitic metals or plastic
NF265 Electric: 1 1/2″ or 2″ NPT standard, flanged available
NF282 Pneumatic: 2″ NPT standard, 1 1/2 NPT or flanged available
Paddle Length: 1 1/2″ standard (for 2″ line), available to your specification
Flow Indication: Less than .75 ft/sec indicates no flow; more than 1.0 ft/sec indicates flow
NFS No Flow SwitchKENCO
Features: The Kenco NO-FLOW SWITCH (“NFS”) is designed to protect the engine and compressor cylinder(s) against lubrication failure. The Kenco “NFS” mounts in line between the lubricator and cylinder. On start up, the first stroke of the lubricator automatically opens the “NFS” switch contact. The contact is opened and closed by the precision-fit plunger inside the “NFS” body. Lubricator oil flows through the body with the rate of flow controlled by the amount of oil that passes between the precision-fit plunger and the bore inside the body. If the lubricator stops pumping, the precision-fit plunger will drift back against the switch contact and stop the engine.
Switch Contact Electrical Rating: 2 amps, 30 VAC or VDC
Switch Contact Circuitry: Case-To-Ground
Flow Rates Required to Open Switch Contact:
• 6 drops per minute or more when using standard plunger spring
• Between 3 and 6 drops per minute when using optional light plunger spring “L” (See ordering note below)
Maximum Recommended Working Pressures:
• NFS-3, NFS-4, NFS-5, NFS-30: 2,000 psig
• NFS-6, NFS-11: 4,000 psig
• NFS-7, NFS-9, NFS-25: 1,750 psig (Consult factory for other available rupture pressure settings)
Switches - Level
282 Pneumatic Level SwitchLINC Level Switch
Electric Float SwitchKENCO
Features: The Model KEFS uses a float to determine the presence or absence of liquid in a vessel at the process connection. The float arm assembly consists of a float at one end and a magnet at the other. As the liquid level in the vessel rises, the float rises, and the magnet falls. The magnet actuates a second magnet on the other side of the pressure boundary. This second magnet causes the switch to change state.
The pressure boundary contains no seals; it is a solid stainless steel barrier that passes a magnetic field, but no liquids. It is impossible for the process liquid to enter the switch enclosure through this barrier. The electrical contacts consist of a microswitch that can be either a Single-pole, Double-throw (SPDT) or Double-pole, Double-throw
(DPDT) Configuration. The SPDT Switch is available with either a 5 Amp or 8 Amp current load. The DPDT switch option is available with a 4 Amp Vac or 5 Amp Vdc
• Maximum operating pressure of 2000 psig.
• Minimum operating specific gravity of 0.53.
• Operating temperature range of -67° F to 257° F; High temperature option -15˚F to 400˚F
• Available with 5A SPDT, 8A SPDT and 4A DPDT (*See switch specifications for full switch ratings).
• Printed circuit board mounted switches and terminal block means wiring electrical connections is easy. No wire splicing is required.
• All wetted parts including switch body are manufactured from 303 Stainless Steel. 316 Stainless Steel wetted parts option available.
• Magnetic Switch actuator operates through a solid steel barrier. There are no seals between the process and the switch compartment that could potentially cause a switch failure.
L471 Electric Level SwitchLINC Level Switch
Features: Used as a high & low level control, the L471 & L471SC can activate alarms, provide a switch input for control systems, or perform a variety of desired electrical switch operations actuated by a liquid or liquid interface.
Pressure: 1,500 psi standard, available to 5,000 psi, (1,500 psi maximum with the Manual Override option)
Temperature: -40ºF to + 400ºF standard
Specific Gravity: 0.4 minimum standard; interface 0.1 differential minimum
Materials: 316 stainless steel wetted parts are standard. Available in other austenitic metals and plastics
Switch Rating: SPST (SPDT optional) 100 V.A. AC, 100W DC, 3 amp inrush capability, maximum of 250 Volts, Hermetically sealed
Electrical: 1/2″ conduit standard, with other sizes optional
Process: 1 1/2″ NPT standard, available in 2″ NPT, 3″ flanged or larger, and externally caged
CSA Certification: Listed as explosion-proof for Class I, Div. 1, Groups A, B, C, D; Class II, Div. 1, Groups E, F, G; and Class III, Div. 1
Pneumatic Float SwitchKENCO
Features: The Model KPFS uses a float to determine the presence or absence of liquid in a vessel at the process connection. The float arm assembly consists of a float at one end and a magnet at the other. As the liquid level in the vessel rises, the float rises, and the magnet falls. The magnet actuates a second magnet on the other side of the pressure boundary. This second magnet is the reactive component in the snap-acting switch that opens and closes the pneumatic valve. Because of the nature of the design, adjustment is rarely, if ever needed. In the event that adjustment is needed, an easy-to-use adjustment screw is provided. The model KPFS is used to actuate pneumatic dump valves, such as the Kenco Model KDV series dump valve, to control liquids in separators, scrubbers, etc.
The pressure boundary contains no seals; it is a solid stainless steel barrier that passes a magnetic field, but no liquids. It is impossible for the process liquid to enter the switch enclosure through this barrier. The Model KPFS Pneumatic Float Switch can be ordered to have the pneumatic valve open when it senses a liquid level rising (-LR option) or open when it senses the liquid level falling (-LF option). A manual valve actuator is provided to open the valve manually if desired.
• Maximum operating pressure of 2000 psi
• Minimum operating specific gravity of 0.53
• Pneumatic valve pressure range of 30 psi to 75 psi
• All wetted parts including the switch body are manufactured from 303/304 Stainless Steel. 316 Stainless Steel wetted parts option available.
• Magnetic Switch actuator operates through a solid stainless steel barrier. There are no seals between the process and the switch compartment that could potentially cause a switch failure.
Thermal Differential Level SwitchKENCO
Features: Kenco’s Thermal Differential Switches are designed for a wide range of flow and level applications. These switches can be used to detect either the overall liquid level or a liquid – liquid interface. They can also be used to detect a specific flow rate or a flow/no flow condition in liquids and gasses.
Level and Interface Detection
Flow Detection for Liquids and Gasses
Fast Response Time
No Moving Parts