These valves have revolutionized the installation of circulator pumps. Our original Isolator unit-flange ball valve design has evolved into the largest flanged ball valve program in the industry today. No matter what your installation requires, there is an Isolator to meet your needs.

With detachable rotating flange
• With adjustable packing gland nut and bolt
• Saves labor, saves space and reduces leak paths
• Prevents electrolysis
• Eliminates galvanic corrosion
• Allows virtually no air into system upon pump replacement
• Slotted holes for high velocity pumps
• Guaranteed for life
• Designed for residential, commercial or industrial use with water or a glycol mixture
• Valve is actuated by a blowout proof stem and features an adjustable packing gland
• Flange features a conical inlet to minimize turbulence
• Other solder materials have lower pressure/temperature limits
• Do not silver braze or over heat valves when soldering
• Patented technology
• Brass end cap, seat retainer, drain end cap, drain stem, drain packing gland and drain handle screw, stainless steel handle nut, vinyl handle jacket, steel zinc plated flange bolts and nuts, PTFE drain seat and drain stem seal, enamel coated aluminum drain handle, EPDM washer, brass cap with EPDM strap
  
  

  Webstone Valve 51413

Liberty 441 Microprocessor

Sid Harvey B70R Bearing Assembly 189100 REMANUFACTURED

Starting with the development of the first zoning dampers and registers in the 1950s to today, with exclusive Plug & Play dampers  Zonefirst has led the way in excellence and continued innovation.
ZONEFIRST is the first company that successfully developed and marketed HVAC Zoning Systems back in the 1950s and is today a leading manufacturer of HVAC zone dampers and zoning systems. Several other major zoning companies are in business due to ZONEFIRST.
It was in the mid to late 1950s when Richard Foster developed the first automatic motorized dampers, registers and difusers that were thermostatically controlled. He marketed these products under the trade name Zone-A-Trol with another company when in 1964 he founded Trolex Corporation and the start of the well known trade name Trol-A-Temp. In 1999 the Trol-A-Temp brand was acquired by Honeywell.
Since that time, Trolex has continued to manufacture zone dampers for a number of OEMs. In 2004 Trolex re-entered the HVAC market as ZONE-A-TROL and later the ZONEFIRST tradename. This new name signifies the many firsts the company has developed in the HVAC industry. We were the first company to develop automatic dampers, registers, and diffusers for zoning, centralized zone controllers, the first zoning system to feature normally open dampers and the first to zone heat pumps in the early 1970s

MSS

MSS

Fujitsu General heating and cooling offers parts that are perfectly designed and engineered to fit your A/C and Heating Unit right the first time and deliver year-round comfort.
Fujitsu Motors K9603601003 DC Brushless Motor

Fujitsu A/C Parts K9603601003

Fujitsu General heating and cooling offers parts that are perfectly designed and engineered to fit your A/C and Heating Unit right the first time and deliver year-round comfort.
Fujitsu Motors K9900790004 Step Motor

Fujitsu A/C Parts K9900790004

Fujitsu General heating and cooling offers parts that are perfectly designed and engineered to fit your A/C and Heating Unit right the first time and deliver year-round comfort.
Fujitsu Motors 9900725006 Step Motor

K9900725006

Fujitsu General heating and cooling offers parts that are perfectly designed and engineered to fit your A/C and Heating Unit right the first time and deliver year-round comfort.
Fujitsu Motors K9602113019 Motor AOU9-12RLQ

K9602113019