Caleffi 3/4" Solar Air Valve - Auto Solar Air Venting Valve Kit
Caleffi AutoClose Solar Air Vent Kit - 3/4" NPT
PN - 251003A
Air separators are used to continuously eliminate air from the primary circuits of solar heating systems. The air vent capacity of these devices is extremely high. They are able to automatically remove all the air from the solar circuits, including microbubbles. The circulation of fully separated fluid allows the system to work under optimal conditions without any trouble with noise, corrosion, local overheating and mechanical damage.
This particular series of air separaots has been specifically designed to work at high temperature with a glycol medium, which is typical of solar heating systems.
Made In Italy
Products for solar applications
Caleffi offers an extensive range of automatic air vents and deaerators for solar applications. These products are specially designed and developed further for use at higher pressures and temperatures. Just like the rest of our product range, the solar applications of Caleffi are 100% leak-free. They are a reliable and low-maintenance factor in your installation.
For use with 1/2" piping use of a 3/4" to 1/2" reducer are required.
In terms of solar applications, too, our products have a dual effect. Caleffi automatic air vents and deaerators improve the efficiency of your installation and save time and money during their installation, commissioning and maintenance.
Continuous deaeration also available for solar systems
Extremely high temperatures can occur in solar systems, which leads to the formation of steam. Valves are installed to prevent vapour release and overheating. Without valves, solar systems can even boil dry.
Caleffi can offer a solar product range with the so-called AutoClose function. These valves only close if it is really necessary.
system will not boil dry via the deaerator;
a permanent air-free, efficient installation;
solar fluid will not prematurely degenerate;
no more climbing to the top to deaerate;
prevents false stagnation;
suitable for new and existing installations.
Technical specifications of 251 series valve Materials:
Body: brass chrome plated
Cover: brass chrome plated
Int. element: stainless steel
Float: high resistance polymer
Floating guide: brass
- Stem: antidezincification alloy
- Float lever: stainless steel
- Spring: stainless steel
Hydraulic Seals: high resistance elastomer
Medium: water, glycol solutions
Max. percentage of glycol: 50%
Working temperature range: -20 to 320ºF (-30 to 160ºC)
Max. working pressure: 150 psi (10 bar)
Max. discharge pressure: 150 psi (10 bar)
Connections: Main 3/4” F NPT, Drain: 1/2” F NPT
We want you to be 100% satisfied with your purchase, if you are not, ship it back to us in the original packaging condition and we will refund your purchase less a 10% restocking fee, provided the equipment is received in good condition. Refund offer valid for 30 days from receipt of product.
Warranty - 2 Years
We accept PayPal and Credit card (Visa or Mastercard). If you are ordering multiple units and part, please call us to see if we can save you shipping cost for multiple item orders.
For complete solar kits please allow 2-3 weeks delivery. These kits are shipped via our preferred freight forwarder company and where possible we will schedule residential tailgate delivery (curbside). Heaters and accessories are usually in stock unless indicated otherwise. We do have expedited shipping services available for an additional fee. Please call us if you need a rush order. Once your order has been shipped you will be contacted via email and a tracking number will be provided.