Berluto DRV678 Reducing Valve (also DRV412)

**Stainless Steel Expansion Vessel for Heating Applications** Introducing the Reliance Valves Aquasystem Heating Expansion Vessels, engineered for optimal performance in heating systems. Available in capacities ranging from 2 litres to 5000 litres, these expansion vessels are designed to handle maximum pressures between 8.0 to 10.0 bar. With their innovative replaceable membranes, the Aquasystem range facilitates in-situ servicing, effectively preventing water contact with the stainless steel vessel shell and minimising the risk of internal corrosion to extend the product's lifespan. **Features and Benefits:** - **Corrosion-Resistant Design:** The stainless steel bolted flange ensures exceptional durability and resistance to corrosion. - **Noise Reduction:** An extra-wide membrane opening allows for unrestricted flow, minimising noise caused by pressure changes. - **Internal Protection:** The internal membrane design prevents any contact between water and the steel shell, significantly reducing the risk of internal corrosion. - **Diverse Capacity Options:** Ranging from 2 to 5000 litres, our vessels are suitable for a wide array of heating applications. - **Simple Maintenance:** Each vessel is supplied with a replaceable membrane, enabling easy servicing without removal. - **Convenient Pre-Charge Valve:** Easily top up air pressure as needed with the integrated pre-charge valve. - **Specific Application Use:** Designed exclusively for heating applications. **Specifications:** - **Capacity:** 750 Litres - **Colour:** Red - **Pre-Set Pressure (Bar):** 4 - **Max Pressure:** Up to 500 Litres - 8.0 bar / 750 Litres and above - 10.0 bar - **Minimum Temperature:** -10°C - **Maximum Temperature:** 99°C - **Height:** 1820mm - **Diameter:** 800mm - **Water Connection:** 2" MBSP **Materials:** - **Shell:** Epoxy Coated - **Membrane:** EPDM - **Bolted Flange:** Galvanised Steel **Standards and Approvals:** - CE marked in accordance with Directive PED 97/23/CE - TUV Certified Explore the reliability and longevity of the Reliance Valves Aquasystem Heating Expansion Vessels for your heating applications and ensure optimal system performance.

The CONCOA 213 Series is a chrome-plated forged brass, dual-stage regulator designed for primary pressure control of low-pressure, non-corrosive, liquefied, or high-purity inert gases (up to grade 4.5). Its two-stage design ensures stable delivery pressure, compensating for cylinder depletion, with adjustable outputs as low as 0.1 PSIG (7 mBAR) in 0.05 PSIG (4 mBAR) increments, making it ideal for atmospheric or sub-5 PSIG (350 mBAR) applications.

Features:

• Fine-adjusting screw for precise pressure control

• 316L stainless steel diaphragm prevents inboard diffusion

• CAPSULE® seat design with 360° filtration in both stages

• Standard relief valve protects diaphragm and gauges

• Helium leak-tested for integrity

Specifications:

• Max inlet pressure: 3000 PSIG (210 BAR); optional 4500 PSIG (310 BAR)

• Body: Chrome-plated forged brass; Bonnet: Chrome-plated die-cast zinc

• Filter: 10-micron sintered bronze

• Diaphragm: 316L stainless steel; Internal seals: PTFE

• Temperature range: -40°F to 140°F (-40°C to 60°C); Cv: 0.02

• Gauges: 2½" (63 mm) steel with brass connection (outlet), 2½" (68 mm) plated case (inlet)

• Seats: PCTFE (first stage), PTFE (second stage)

• Ports: 1/4" FNPT

• Compliance: Meets/exceeds CGA G-4.1, PED 2014/68/EU, ANSI/ASME B40.1, CRN OH5216

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.