Caleffi 535051A 5350 Series Autofill 3/4" Union NPT with Pressure Gauge

The 5350 series AutoFill automatic filling valve is a pressure reducing valve which when installed on the water inlet piping in closed hydronic systems will maintain system pressure at a set value, automatically filling up with water as required. Fast fills the system to set pressure then automatically shuts off the water feed. This product is factory pre-set to 15 psi system pressure. To adjust the set pressure, simply turn the adjustment knob while observing the integral dowmstream pressure gauge. This product has the characteristic of being preadjustable, which means that it can be adjusted at the right pressure value before the system charging phase. After installation, the system pressure will automatically adjust itself to the set value and the water feed will stop when the set pressure is reached. The internal cartridge containing all the controlling components is preassembled as a selfcontained unit, to facilitate inspection and maintenance procedures.

• Materials - Body: Brass
• Cover: Glass Fiber Reinforced Nylon PA66G30
• Control Spindle: Stainless Steel
• Moving Parts: Brass
• Diaphragm and Seals: NBR
• Filter: Stainless Steel

• Suitable fluids: Water
• Max. Working Pressure: 365 psi (25 bar)
• Downstream Pressure Setting Range: 6-90 psi (0.5-6 bar)
• Factory Setting: 15 psi (1.035 bar)
• Max. Working Yemperature: 140°F (0-60°C)
• Pressure Gauge Scale: 0-100 psi (0-7 bar)
• Filter Mesh Size: 0.51 mm (35 mesh)