Page number 4
HOW TO SELECT The FlowCon S-JUST is to be selected based on the required design flow and pipe size. The FlowCon S-JUST’s pressure loss ΔpBV is found in the flow/pressure/setting diagrams. EXAMPLE: Design flow = 100 l/hr = 0.1 m 3 /hr (0.44 GPM) Pipe size = DN20 (3/4”) Select valve based on line size and system requirements to eliminate pipe modifications. In this example FlowCon S-JUST DN20 (3/4”) is selected. With its maximum flow of 100 l/hr (0.44 GPM) this valve size matches both size and flow requirements. Set valve to required design flow by checking ‘flow curves and settingsvv’-diagram. Find flow in the left column and follow a horizontal line to the first reached pre-setting graph. In this example proper setting will be 1.5. Determine ΔpBV following a vertical line down from the inter- section between design flow and setting. From the specific valve diagram, ΔpBV is at a flow rate of 100 l/hr (0.44 GPM) in setting 1.5 read to be 2 kPaD (0.29 psid). Δ pBV Controlled Circuit Δp H Δ pC Δ pV Δ pC = Controlled Δ p Circuit ΔpV = Δ p across FlowCon EDP ΔpBV = Δ p across FlowCon S-JUST Δ pH = Δ p Pump Head FLOW CURVES AND SETTINGS 10000 FlowCon S-JUST 1000 Flow (l/hr) 100 10 1 10 100 Δ pBV (kPaD) 1,1 1,2 1,3 1,4 1,5 2 2,5 3 3,5 4 4,5 5 Tech note · FlowCon S-JUST · june 2021 · www.flowcon.com Page 4 of 5
Page number 5
GENERAL SPECIFICATIONS 1. STATIC BALANCING VALVES WITH EXTERNAL ADJUSTABLE SETTING – FLOWCON S-JUST 1.1. Contractor shall install the static balancing valves where indicated in drawings. 1.2. Valve shall consist of a static, accessible, adjustable flow regulation unit. 1.3. Valve shall be available orifice type with precise flow regulation according to system pressure. 2. VALVE HOUSING 2.1. Valve housing shall consist of forged DZR brass ASTM CuZn36Pb2As, rated at no less than 2500 kPa (360 psi) static pressure at +120°C (+248°F). 2.2. Housing shall be permanently marked to show direction of flow. 2.3. Pressure/temperature test plugs for verifying performance shall be available for all valve sizes. 2.4. Valve housing shall be for threaded installation without any pipe length restrictions before and after the valve. 3. FLOW REGULATION UNIT 3.1. Flow regulation unit shall consist of brass and PSU. 3.2. Flow regulation unit shall be readily accessible for change-out or maintenance. Flow regulation unit shall be adjustable with the valve in-line and the system in operation. 3.3. Flow regulation unit shall be externally adjustable to 1 of 41 different Kv values. 3.4. Flow regulation unit shall include a metal to metal shut-off function. UPDATES For latest updates please see www.flowcon.com FlowCon International can accept no responsibility for possible errors in any printed material. All rights reserved. Tech note · FlowCon S-JUST · june 2021 · www.flowcon.com Page 5 of 5
