Hattersley Fig 44 PN20 Check Valve

                        Berluto float valves are exceptionally robust and dependable. Established in 1920 by Jean Bergner, who patented his innovative design in 1917, Berluto began with valves intended for toilet flush systems. Today, our float valves are utilised across a wide range of applications. They are employed globally in sectors such as agriculture and industry for filling separation or storage systems, as well as for regulating the levels in poultry drinking troughs, humidifiers, car washes, booster stations, and pond constructions, among others. Our technology remains at the forefront of innovation, and our float valves are even implemented in advanced fields like aircraft manufacturing. Designed for reliability, our float valves regulate inflow and water levels without the need for auxiliary power or delicate sensors. True to our ethos: simply install and forget! Additionally, in most of our valve types, the only genuine wear parts—the nozzle and seal—can be easily replaced when necessary, particularly after exposure to aggressive or abrasive media. This level of serviceability is far superior to that offered by competing brands. Regardless of the type of media you require or the flow rates involved, we provide the most suitable float valve for your specific needs. Our range includes options made from brass, red bronze, or stainless steel, featuring NBR or FKM seals, along with PE, copper, or V4A floats. Choose Berluto for reliable, high-quality float valves tailored to your industry requirements.

**Altecnic / Caleffi 313 Relief Valve with Gauge - Model 313430** The Altecnic / Caleffi 313 Relief Valve with Gauge (Model 313430) is an essential component for domestic hot water systems, ensuring the safety of your hot water cylinder. This valve also plays a crucial role in heating systems by protecting the boiler and other integral components. Designed to operate at a specified set pressure, this valve opens to the atmosphere when pressure thresholds are exceeded, effectively preventing dangerous pressure levels that could affect the boiler, hot water storage cylinder, and the safety of nearby personnel. Each unit is supplied with an integrated pressure gauge for easy monitoring. ### Product Specifications - **Size:** 1/2" x 1/2" - **Connections:** BSP Female Inlet x BSP Female Outlet - **Materials:** Brass - **Compatible Mediums:** Air and Water - **Set Pressure:** 3 Barg - **Discharge Flow Rate:** 142.1 kg/hr - **Max Boiler Rating:** 82.5 kW - **Temperature Range:** +5 to +110°C - **Product Code:** 313430 - **Certification:** WRAS approved, CE marked - **Included:** Pressure gauge Ensure the safety and efficiency of your heating system with the Altecnic / Caleffi 313 Relief Valve. Ideal for both domestic hot water and heating applications, this valve is a vital addition to any service or installation.

Features & Benefits

• Offers precise and accurate flow regulation for optimal performance. • User-friendly handwheel operation accompanied by a numerical indicator for straightforward adjustments. • Integrated orifice and test points eliminate the need for a separate Differential Regulation Valve (DRV) and metering station. • WRAS Approved for use with drinking water up to 85°C. • Ensures positive flow control across all handwheel settings. • The FODRV guarantees an accuracy of ± 5% on all settings, providing reliable flow regulation and measurement.

Specification

• Complies with BS7350: 1990 standards. • Operated via handwheel for ease of use. • Features a numerical indicator for clear visibility. • Inside screw non-rising handwheel design. • Incorporates a characterising regulating disc for effective flow management. • Includes an integral fixed orifice for enhanced reliability. • Supplied with two Figure 631 test points for convenient monitoring. • Flow charts available to assist in system design. • End connections are threaded for compatibility. • Available in sizes 1 to 2" taper threaded as per BS EN 10266 (ISO 7-1), previously BS 21. • Sizes 1/2" and 3/4" comply with ISO 228 parallel standards. • Also available in sizes DN15 and DN20 when combined with compression adaptors suitable for copper pipes in accordance with BS EN 1057 R250 (half hard). • Regarded as a WRAS Approved Product.

Pressure/Temperature Rating

• Please refer to the datasheet for detailed specifications.