Flow Switches Made in the U.S.A.

PEECO E Series Flow Switch

PEECO E Series Flow Switch

For Hazardous Locations with Maximum Allowable Pressure up to 600 PSI

For Liquid or Gas Service

PEECO E Series Flow Switch
PEECO E Series Flow Switch

The PEECO E Series Flow Switch is a flow actuated electrical switch and is unique in the field of flow controls. These switches are not a standard shelf item, but are specifically produced to accommodate your application. The PEECO flow switches are maintenance free in lines from 1/16″ to 12′ or larger.  The PEECO E Series flow switch is explosion proof model.  All E Series models are rugged, heavy duty units exceeding all UL Code requirements. Each of the four basic styles are adaptable to many other fittings and configurations. Utilizing 1/4″ thick Heat treated aluminum cover with 5 fully engaged threads, these units are designed to encapsulate any internal explosion. All PEECO explosion proof models meet Class 1, Group D requirements for use in hazardous locations. The housing & cover are both made of heat treated aluminum T-356 and are epoxy coated (for extra protection). Conduit outlet: 1/2″ FNPT on all models; 3/4″ and metric sizing available.

PEECO flow switches typically consist of a sensor element, a housing, and an electrical connection. The sensor element is positioned in the fluid flow and is designed to detect changes in fluid velocity. This information is then used to determine the flow rate of the fluid.

The housing of the PEECO flow switch is used to protect the sensor element and the electrical connection from the environment. The electrical connection allows the flow switch to be connected to control systems, alarms, or other devices.

PEECO flow switches can be used in a variety of applications, including process control, industrial automation, and fluid management systems. They are often used in applications where precise control of fluid flow is required, such as in chemical processing, pharmaceutical manufacturing, and power generation.

Standard Specifications include:

Cover: Heat Treated Aluminum 356-T6
Housing: Heat Treated Aluminum 356-T6
Body: Carbon Steel or 316SS
Bellows: Seamless 321 Stainless Steel
Stem Paddle: 302, 303 Stainless Steel
Bearings: 440C Stainless Steel Micro Ball
Name Plates: Aluminum
Micro Switch: 15A, 125-250-480 VAC SPDT 1/2 A., 125VDC (1 N.O., 1 N.C., 1 Comm.)
Conduit Connection: 1/2” FNPT
Maximum Pressure: 600 psi (41 Bar)
Maximum Temperature: 300° F (148°C)

Some of the common options added to this flow switch include:

How Does a PEECO E Series Flow Switch Work?


PEECO flow switches are actuated by flow – not pressure. It works by detecting changes in fluid velocity, which are then translated into changes in pressure. The flow switch can then be used to control the flow of fluid, regulate process variables, or activate alarms. No need to be concerned with minimum and maximum flow … you state your requirements, PEECO will accommodate them. From -450° F to +1500° F. From high vacuum service to 600 psi. Fully field adjustable over the entire range (less than 10% dead band/differential between make and break).

The desired flow indication – increase, decrease, reverse – is transmitted mechanically from the line media by deflection of the paddle through the stem and bellows assembly, causing micro-switch actuation and resultant electrical contact for transmission of signal to whatever ultimate point desired.

Base travel of the PEECO E Series flow switch stem is 1/4″. Standard Micro-switch travel is approximately .005″

Our trained technical staff is available (at no cost to you) for consultation, design suggestions, engineering, layout problems or a general discussion of PEECO flow actuated electrical switches and their place in the dynamics of flow.

Available PEECO Models

Wafer Mount Model ET-F


Connection: Wafer Tee
Standard Size: 2″ 150# or 300# R.F.
Optional: Any size, style and rating.
Line Size: 2″ and under (standard) over 2″ (optional).
Also available in low and low-low flow models

Threaded Tee Mount Model ET


Connection: Screwed Tee.
Standard Size: Specify Size.
Optional: Socket-Weld, Butt-Weld.
Line Size: 2″ and under (standard) over 2″ (optional).
Also available in low and low-low flow model.

Screwed MNPT Mount Model EP-S


Connection: Screwed Top Mount.
Standard Size: 2″ npt.
Optional Size: Any other size.
Line Sizes: 2½” and up.

Flanged Mount Model EP-F


Connection: Flanged
Standard Size: 2″ 150# or 300# R.F.
Optional Size: Any size, style and rating.
Line Size: 2½” and up.
(specify distance from face of mounting flange to top i.d. or c/l of pipe and pipe size)