Brochure

3
108
121
9
108
AIR SEPARATOR AND SAFETY RELIEF VALVES
LOW LEAD MIXING VALVES
Adjustable thermostatic three-way mixing
valve for solar systems with built-in inlet
check valves.
Setting range: 80—150ºF.
Max. working pressure: 200 psi.
Max. inlet temperature: 210ºF.
Connection: ½", ¾", 1" sweat.
Certified to ASSE 1017, CSA B125.3,
UPC, IPC, Low Lead Laws and listed by
ICC-ES for use in accordance with the U.S.
and Canadian plumbing codes.
2521
ASSE 1017
Check valve for use in 2521 mixing valve.
Max. inlet temperature: 210ºF.
Air separator for solar heating systems.
Working temperature range: -20—320ºF.
Max. working pressure: 150 psi.
Max. discharge pressure: 150 psi.
Connections: Main, ¾" NPT, female
Bottom, ½" NPT, female
251
DISCAL
®
Code Description Lbs USD
251003A ¾" NPT female 2.0 232.00
Safety relief valves for solar systems.
Working temperature range: -20—360ºF.
Normal pressure: 150 psi.
Opening over pressure: 10%.
Closing differential: 20%.
Discharge capacity: 171,000 Btu.
Connections: Inlet, ½" female.
Discharge, ¾" female.
TÜV certified to TRD-721-SV100 7.7.
Meets ANSI Z21.22 standard.
253
TÜV Rheinland is an approved U.S. Nationally
Recognized Testing Laboratory (NRTL) Certification
Body for Pressure Equipment. Meets ANSI Z21.22
“Relief Valves for Hot Water Supply Systems.”
Code Description Lbs USD
253042 Factory set to 35 psi 0.3 86.90
253043 Factory set to 45 psi 0.3 86.90
253044 Factory set to 60 psi 0.3 86.90
253046 Factory set to 90 psi 0.3 86.90
253048 Factory set to 120 psi 0.3 86.90
253040 Factory set to 150 psi 0.3 86.90
Code Description Lbs USD
R29326 Check valve insert 0.1 10.40
Code Description Lbs USD
252149A ½" sweat unions 1.2 281.00
252158A ¾" sweat unions with gauge 1.2 363.00
252159A ¾" sweat unions 1.2 295.00
252168A 1" sweat unions with gauge 1.2 413.00
252169A 1" sweat unions 1.2 342.00
COLD
HOT
MIX
The controlling element of the solar thermostatic mixing valve is a
temperature sensor that is fully immersed in the mixed water outlet passage.
As it expands or contracts, the sensor continuously establishes the correct
proportion of hot and cold water entering the valve. The flow is regulated
by a piston sliding in a cylinder between the hot and cold water passages.
Even when there are pressure drops due to the drawing off of hot or cold
water for other uses or variations in the incoming temperature, the mixer
automatically regulates the water flow to obtain the required temperature.
Operating principle