TECHNICAL CATALOGUE PRESSURE REDUCING VALVES EUROPRESS
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1 TECHNICAL CATALOGUE PRESSURE REDUCING VALVES EUROPRESS
2 ITAP SpA, founded in Lumezzane (Brescia) in 1972, is currently one of the leading production companies in Italy of valves, fittings and distribution manifolds for plumbing and heating systems. Thanks to fully automated production processes, with 63 tooling machines and 25 assembly lines, we are able to produce 150,000 pieces per day. Our innate pursuit for innovation and observance of technical regulations in force is supported by the company certification ISO 9001: The company has always considered its focus on quality as the main tool to obtaining significant business results: today ITAP SpA is proud to offer products bearing the approval of numerous international certifying bodies. THE COMPANY
3 TEC Europress pressure reducing valve is a device which reduces and stabilizes the upstream pressure to an adjusted downstream pressure. When the entering pressure from the public mains is too high and variable, pressure reducing valve stabilizes the downstream pressure to the adjusted one. Possible variations of the upstream pressure do not influence the adjusted downstream pressure. This range of pressure reducing valves allows the operator to adjust the downstream pressure to a set figure. Pressure reducing valves are suitable for domestic water services, heating and air-conditioning plants, compressed air systems*. They can be used with water, compressed air and no-aggressive fluids. ITAP Pressure reducing valves comply with the requirements of Council Directive 97/23/EC (PED) and the CE marking is not requested according to art. 3 clause 3 of DL 25/02/2000 n. 93. (* In the type-testing according to PED Council Directive, it is necessary that pressure reducing valves were approved as a part of the installation). EUROPRESS
4 143 EUROPRESS PRESSURE REDUCING VALVE SIZE PRESSURE CODE PACKING 1/2 (DN 15) 25bar/362,5psi /34 3/4 (DN 20) 25bar/362,5psi /34 1 (DN 25) 25bar/362,5psi /18 1 1/4 (DN 32) 25bar/362,5psi /9 1 1/2 (DN 40) 25bar/362,5psi /9 2 (DN 50) 25bar/362,5psi /8 2 1/2 (DN 65) 25bar/362,5psi /6 3 (DN 80) 25bar/362,5psi /4 4 (DN 100) 25bar/362,5psi /3 TECHNICAL SPECIFICATIONS Compensated piston operation. Female/female threads. Body in nickel-plated brass. Minimum and maximum working temperatures: 0 C, 80 C. Maximum inlet pressure: 25bar. Outlet pressure can be adjusted: - 1/2-3/4-1 between 1 and 5,5 bar /4 through 4 between 1 and 6 bar. Factory preadjustment 3 bar. Outlet pressure gauge connection 1/4 on both sides. Threads ISO228 (equivalent to DIN EN ISO 228 and BS EN ISO 228). Available also with NPT thread in the sizes 2 1/ PRESSURE REDUCING VALVES EUROPRESS OVERALL DIMENSIONS F F C B A 1/2 3/ /4 1 1/ /2 3 4 DN A B 125,5 125, C , ,5 140,5 F ,5 Kg/cm 2 bar LBS - psi 362,5 362,5 362,5 362,5 362,5 362,5 362,5 362,5 362,5
5 MATERIALS FROM 1/2 TO 1 TEC POS. DESCRIPTION N. MATERIAL 1 Body 1 Nickel-plated brass CW617N 2 Seat 1 Stainless steel AISI Bottom plug 1 Nickel-plated brass CW617N 4 O-Ring 1 EPDM 5 Shutter 1 Brass CW614N 6 Flat seat washer 1 EPDM 7 Stem 1 Brass CW614N 8 O-Ring 1 EPDM 9 O-Ring 1 EPDM 10 Diaphragm 1 Brass CW617N 11 Upper plug 1 Nickel-plated brass CW617N 12 Spring 1 EN DH 13 Nut 1 Nylon 14 Regulator 1 Nickel-plated brass CW617N 15 Cap 2 POM EUROPRESS
6 MATERIALS FROM 1 1/4 TO POS. DESCRIPTION N. MATERIAL 1 Body 1 Nickel-plated brass CB753S PRESSURE REDUCING VALVES EUROPRESS CERTIFICATIONS 2 Bottom plug 1 Nickel-plated brass CW617N 3 O-Ring 1 NBR 4 Shutter 1 Brass CW614N 5 O-Ring 1 NBR 6 Stop washer 1 Brass CW614N 7 Flat seat washer 1 NBR 8 Seat 1 Stainless steel AISI Stem 1 Stainless steel AISI O-Ring 1 NBR 11 Stop ring 1 Brass CW625N 12 O-Ring 1 NBR 13 Diaphragm 1 Brass CW617N 14 Upper plug 1 Nickel-plated brass CW617N 15 Spring 1 EN SM/SH 16 Nut 1 Nylon 17 Regulator 1 Nickel-plated brass CW617N 18 Cap 2 POM DN15 - DN20 ACCORDING TO STANDARD EN 1567
7 143MM TEC EUROPRESS PRESSURE REDUCING VALVE, WITH UNION CONNECTIONS SIZE PRESSURE CODE PACKING 1/2 (DN 15) 25bar/362,5psi MM 1/34 3/4 (DN 20) 25bar/362,5psi MM 1/24 1 (DN 25) 25bar/362,5psi MM 1/18 1 1/4 (DN 32) 25bar/362,5psi MM 1/9 1 1/2 (DN 40) 25bar/362,5psi MM 1/9 2 (DN 50) 25bar/362,5psi MM 1/6 TECHNICAL SPECIFICATIONS Compensated piston operation. Union connections. Body in nickel-plated brass. Minimum and maximum working temperatures: 0 C, 80 C. Maximum inlet pressure: 25bar. Outlet pressure can be adjusted: - 1/2-3/4-1 between 1 and 5,5 bar /4 through 2 between 1 and 6 bar. Factory preadjustment 3 bar. Outlet pressure gauge connection 1/4 on both sides. Threads ISO228 (equivalent to DIN EN ISO 228 and BS EN ISO 228). OVERALL DIMENSIONS F F A 1/2 3/ /4 1 1/2 2 DN A B 125,5 125, C , F Kg/cm 2 bar LBS - psi 362,5 362,5 362,5 362,5 362,5 362,5 C B EUROPRESS
8 MATERIALS FROM 1/2 TO PRESSURE REDUCING VALVES EUROPRESS POS. DESCRIPTION N. MATERIAL 1 Body 1 Nickel-plated brass CW617N 2 Seat 1 Stainless steel AISI Bottom plug 1 Nickel-plated brass CW617N 4 O-Ring 1 EPDM 5 Shutter 1 Brass CW614N 6 Flat seat washer 1 EPDM 7 Stem 1 Brass CW614N 8 O-Ring 1 EPDM 9 O-Ring 1 EPDM 10 Diaphragm 1 Brass CW617N 11 Upper plug 1 Nickel-plated brass CW617N 12 Spring 1 EN DH 13 Nut 1 Nylon 14 Regulator 1 Nickel-plated brass CW617N 15 Cap 2 Nylon 16 Flat seat washer 2 Fiber 17 Nut 2 Nickel-plated brass CW617N 18 Fitting with flat seat 2 Nickel-plated brass CW617N
9 MATERIALS FROM 1 1/4 TO TEC CERTIFICATIONS POS. DESCRIPTION N. MATERIAL 1 Body 1 Nickel-plated brass CB753S 2 Bottom plug 1 Nickel-plated brass CW617N 3 O-Ring 1 NBR 4 Shutter 1 Brass CW614N 5 O-Ring 1 NBR 6 Stop washer 1 Brass CW614N 7 Flat seat washer 1 NBR 8 Seat 1 Stainless steel AISI Stem 1 Stainless steel AISI O-Ring 1 NBR 11 Stop ring 1 Brass CW625N 12 O-Ring 1 NBR 13 Diaphragm 1 Brass CW617N 14 Upper plug 1 Nickel-plated brass CW617N 15 Spring 1 EN SM/SH 16 Nut 1 Nylon 17 Regulator 1 Nickel-plated brass CW617N 18 Cap 2 Nylon 19 Flat seat washer 2 Fiber 20 Nut 2 Nickel-plated brass CW617N 21 Fitting with flat seat 2 Nickel-plated brass CW617N EUROPRESS
10 PRESSURE DROP CHART WITH WATER Pressure drop diagram includes the loss of pressure proportional to a specific flow rate. According to the requested flow rate, it is possible to measure the water system and the pressure reducing valve correctly (it would be better to have a flow speed between 1 m/s and 2 m/s in the piping). INSTANCE: In case of ½ pressure reducing valve with an adjusted downstream pressure of 3 bar and a flow rate of 35 l/min, the pressure drop diagram states a loss of pressure of 0.62 bar. It means that the pressure gauge installed on the outlet way of pressure reducing valve shows a figure of 2.38 bar (= 3 bar 0.62 bar). Here mentioned figures refer to: upstream pressure 8 bar, downstream pressure 3 bar. N.B. Figure about 4 are approximate. PRESSURE REDUCING VALVES EUROPRESS Pressure drop [Bar] /2 3/ Flow rate [l/min] 1 1 1/4 1 1/ / DN 1/2 3/ /4 1 1/ /2 3 4 Kv (m 3 /h) 3,6 4 6,6 9,6 10, ,
11 MANIFACTURER INSTRUCTIONS Installation For the best use and duration of the system, it is necessary to comply with the following instructions on installation, with the national regulations and with relevant local requirements. - Place of installation has to be protected from frost and has to be easily inspectable - Install the pressure reducing valve on the private water system, immediately downstream of the water meter - It would be better to install shut-off valves upstream and downstream of the pressure reducing valve, to facilitate the maintenance operations - In order to protect pressure reducing valve from overpressure, install a check valve immediately downstream of the pressure reducing valve - The right scheme of installation is shown in Fig In case of water heater downstream of the pressure reducing valve, install an expansion vessel between the valve and the water heater - In order to avoid cavitation and therefore excessive noiseness, it is strongly recommended that the ratio between maximum upstream pressure and regulating downstream pressure does not exceed the value of 2,5. - Pressure reducing valve is not a safety device. It would be better to install all the necessary safety relief valves. Please, duly note the downstream pressure of the reducing valve has not to be higher than the maximum working pressure of the devices installed in the private water system, in order to avoid possible damages or malfunctions. TEC Instruction on installation 1. Before installing the pressure reducing valve, open all the outlets to flush the system and expel any air left in piping 2. Install shut-off valves upstream and downstream to facilitate maintenance operations 3. For a right flow direction, use the arrow stamped on the body 4. ITAP pressure reducing valve can be installed in either vertical or horizontal piping. It can be installed also upside down 5. Art. 143 is equipped with a threaded connection suitable for a pressure gauge. It is possible to unscrew the plug made in order to install a pressure gauge in the size of 1/4. In such a position, the pressure gauge shows the downstream pressure of the reducing valve. 6. The whole range of ITAP pressure reducing valves are tested and adjusted with a downstream pressure of 3 bar. It is possible to change the downstream pressure by means of the adjusting device. 7. The final adjustment of the pressure reducing valve has to be carried out with a filled private water system and with all the outlets shut-off. The upstream pressure has to be at least 1 bar higher than the adjusted pressure. Adjustment of the pressure reducing valve to a downstream pressure different from the pre-adjusted one (3 bar): - Close the downstream shut-off valve - Unscrew the nylon nut (Fig. 4.1) - Adjustment is carried out by means of a tool or a screwdriver on the upper part of the device (Fig. 4.2); turn in clockwise way to increase the downstream pressure, turn in anticlockwise way to reduce the downstream pressure - Open the outlets in the private water system, in order to check the stability EUROPRESS
12 MANIFACTURER INSTRUCTIONS of the adjusted pressure - Adjust the downstream pressure with outlets totally shut-off and with water at room temperature only - Screw the nylon nut (Fig. 4.3) - Adjustment procedure is complete once the required pressure appears on the pressure gauge. FIG. 4.1 FIG. 4.2 FIG ITAP s.p.a. recommends the use of PTFE as a sealant in junctions between pressure reducing valves and water pipings. Troubleshooting Increase in pressure downstream on the pressure reducing valve with a water heater in-line. This problem is due to heating of the water, caused by the water heater. The pressure downstream increases, due to water expansion, as the pressure reducing valve is correctly closed. It is necessary to install an expansion vessel between the pressure reducing valve and the water heater to absorb the pressure increase (Fig. 5.1). PRESSURE REDUCING VALVES EUROPRESS The pressure reducing valve does not maintain the adjusted figure In most cases, this problem is due to the presence of impurities on the valve seat, causing blow-by and consequent increase in the downstream pressure. Install an Y-strainer upstream of the pressure reducing valve. Carry-out the maintenance of the Y-strainer. Flush the water system before installing the pressure reducing valve. Ball valve Flow direction Y strainer FIG. 5.1 Pressure reducing valve Check valve FIG. 5.2 Ball valve
13 NOTES TEC We reserve the right to make improvements and changes to the products described herein and to the relative technical data, at any time and without forewarning. EUROPRESS
14 ITAP S.p.A. Via Ruca Lumezzane Brescia (ITALIA) Tel Fax /2016
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