and have joined forces!

Rollover image above to zoom


Price: $1,340.41
Excl. Shipping
SKU: RELG71855
(See Product Details Below for Manufacturers Part Numbers)
Discount Shipping

Our volume UPS discounts are passed-on directly to you for the lowest possible shipping rates.

Manufacturer: Johnson Controls


Category: Electrical Controls

Sub Category: Switches & Relays

Step Controller

The Johnson G-7185 Pneumatic Step Controller is

designed to regulate electric heating elements in

accordance with the demands of a direct acting,

single or dual temperature pneumatic thermostat.

The G-7185 is available with six or nine pressure

electric switches adjusted for sequence operation

within a nominal operating range of pilot pressure.

Each switch is rated at 20 amperes 480 volts A.C.

(non-inductive); 360 V.A., 120-480 volts A.C. pilot

duty. The G-7185 is U.L. component recognized.

The solenoid operated exhaust valve and a reverse

acting 2:1 cumulator are integral parts of the G-7185

and act as fail safe devices. If a power failure occurs

in the fan circuit, the solenoid valve exhausts the

control air from the switches returning them to their

normally open position.

For unit ventilator applications, 120 volts A.C. six or

nine point models are available with a line cord and

plug and 1/8 in. brass barbed fittings for supply and

pilot pressure connections.


The reverse acting cumulator varies its output

pressure inversely to the pilot air pressure changes

from the thermostat, at a 2:1 ratio. With full pilot

pressure from the direct acting thermostat to the

cumulator, the output pressure will be 0 psig and all

of the pressure electric switches will be de-energized.

As the temperature at the thermostat decreases, the

output pressure of the cumulator increases. When

the cumulator output reaches 6.5 psig, the switches

begin to close. The nine switch model closes in

steps of 0.8 psi and the six switch model in steps of

1.2 psi until all the switches are closed and all

heating elements are energized.


The G-7185 is furnished in a heavy gage metal

cabinet designed for unit ventilator end compartment

mounting or wall mounting in any position. Conduit

knockouts are provided in the top and bottom of the


Replaces Part Numbers: G-7185-5, CARG-7185-5

I called trying to find out what happened to the rest of my order and was surprised to hear a warm and kind voice willing to do whatever it takes to find answers and follow through with her promise. Amanda is an asset worth holding on to and a credit to your company. She was very professional, helpful and courteous while assisting me with my order. I would most definitely assign her an A+ in customer service."
Donald "Brad" Thomas

I would like to thank you for your hard work in getting us our part in a timely fashion. You were very helpful and you understood the severity of the situation and did a wonderful job in getting the part to us. Thanks again and please share this with your boss! You were outstanding!"
Todd Mills

Share This:
Have Questions?
Our parts Experts are happy to help!

Available Monday to Friday 10am - 6:30pm EST
Email our Parts Experts
Accredited BusinessGo
Amanda I want to thank you, the blower fan work perfectly. Thank you so very much."
Bill K Roberts
Amanda, Thank you very much again, I have been looking for this part for about two weeks and getting very frustrated in the process of the search, you were very helpful!!"
Ken Holm
Why Buy From Us?
110% Lowest Price Guarantee
Over 500,000 Parts in Stock
Same Day Shipping on Orders Received Before 3pm EST (Mon-Fri)
Nationwide Distribution Centers for Fast Delivery
Choose from UPS Next-Day, 2-Day, 3-Day and Ground Service
We Supply Retail and Wholesale
Order from us.
Risk Free, with
Our Triple Guarantee
Guarantee 1
No hassle, 30-day returns policy
Guarantee 2
110% Lowest price guarantee
Guarantee 3
90-day warranty
Sign up for Special Offers Directly from | 1042 N. Mountain Ave., #B546 | Upland, CA 91786
© 2003-2020 All Rights Reserved.