Solar Safety Valve

About Solar Safety Valve

HYDRAULIC FEATURES

The Solar safety valve with manual hand wheel is an automatic safety valve designed to open in the event the internal pressure of the system reaches a predetermined maximum pressure (Preset Nominal Pressure Pnr)allowing the water to be released through it. The safety valve resets automatically when the internal pressure of the system returns below the predetermined maximum pressure. All the moving parts of this safety valve, including the regulating spring, are isolated from heat-transfer fluids by an industrial rubber diaphragm. The Solar safety valve with manual hand wheel satisfies the essential safety requirements stipulated in the EU Pressure Equipment Directive (PED) 97/23/EC.

TECHNICAL FEATURES

Pressure :   Maximum allowable working pressure (PS)   10 bar Preset nominal pressure (Pnr)   2.5-3-4-6-8 bar (factory set and sealed) Minimum sealing pressure (Pc)   -5 % of the Pnr Overpressure (Po)   10% of the Pnr Reset value (Pf)   -20 % of the Pnr Temperature :   Pipeline connection   160° C Threading :   Maximum allowable   Threads according to ISO 228/1 Compatible fluids :   Generic fluids   water and Group 2 fluids Heat transfer fluids in compliance with Italian national standards (UNI 8065 § 6)     Glycolate solutions (glycol)   50% Requirements and tests as per :   Solar thermal energy   ISO 4126-1 § 7.2 Type Test (functional aspects) with reference to   EN 12976-2 Annex D par. 5.6.1. Pressure test according to Annex I, Section 3.2.2 of the PED directive. PED operating limits :   Maximum allowable temperature (TS)   160° C Maximum allowable working pressure (PS)   10 bar Conformity assessment procedures   Modules B and D PED risk category   IV (CE 1115) Flow Coefficient (K) = 0.05 - Classified as an "Ordinary Valve" under EN 10412 § 11.4.2 DESIGN Brass Body   EN 12165 - CW617N Head valve   Brass - EN 12164 - CW614N Hand wheel   PA66-GF30 polyamide (nylon 66) reinforced with glass fibre Spring and counterweight in STAINLESS STEEL   PA66 polyamide (nylon) Diaphragm   70 Sh preshaped EPDM rubber (peroxide cured) Sm GALVANIZED STEEL spring   EN 10270-1 Nickel plating ELECTRO DEPOSITED COATING EN 12540 (Cu/Ni5s)

PRODUCT SIZE

15 - F - 1/2"

Features Table

Automatic Pressure Relief for Solar Systems

Designed for optimal safety, this valve automatically discharges excess pressure, maintaining operational stability in solar water heating setups. Its spring-actuated brass structure ensures precise relief at 3 Bar, protecting equipment from damage. Stainless steel disc and advanced O-ring sealing contribute to leak-proof performance, giving peace of mind for residential use.


Superior Durability and Maintenance-Free Operation

Fabricated with corrosion-resistant brass and available in chrome-plated or polished finishes, the valve resists harsh water conditions. The compact design is built for longevity, minimizing maintenance needs over years of continuous use. Installation is effortless, thanks to the threaded BSP connection and vertical mounting position.