PENN Controls Products Catalog

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Table 285: European standard production models Product code Construction Valve size and connection Element style Shipping weight, kg (lb) V246HA1B001C Direct acting, maritime 3/8 in. BSPP screw, ISO 228 Style 5 0.8 (1.8) V246HC1B001C Direct acting, maritime 3/4 in. BSPP screw, ISO 228 Style 5 2.0 (4.3) V246HD1B001C Direct acting, maritime 1 in. BSPP screw, ISO 228 Style 5 4.3 (9.5) V246HE1B001C Direct acting, maritime 1 1/4 in. BSPP screw, ISO 228 Style 5 4.7 (10.3) V246HR1B001C Direct acting, maritime 1 1/2 in. flange, DIN86021 Style 5 6.2 (13.6) V246HS1B001C Direct acting, maritime 2 in. flange, DIN86021 Style 5 12.3 (27) Valve sizing information Each application is unique and requires specific engineering data to correctly size and design a system to fulfill the appropriate requirements. Typically, a valve is replaced with another valve of the same size in a correctly sized and engineered system. In North America, contact Johnson Controls ® / Penn Refrigeration Application Engineering at 1-800-275-5676 to obtain specific engineering data. In other areas, contact the local Johnson Controls sales office to obtain specific engineering data. To make a rough field estimate of the size of valve for an application, find the valve size that you need by locating a point on a flow chart that satisfies these requirements: • Water flow that the condenser requires (Flow) • Refrigerant head pressure rise (P RISE ) • Available water pressure (P AVAIL ) Follow these steps, and use the information that you obtain to locate a point on one of the flowcharts that satisfies all three requirements. 1. Refer to information from the manufacturer of the condensing unit for the water flow that the condenser requires (Flow). If the manufacturer's information is unavailable, use the following information to make an approximation of water flow in gallons per minute (cubic meters per hour): - System capacity (tons of refrigeration) - Outlet water temperature (Temp. Outlet ) - Inlet water temperature (Temp. Inlet ) Calculate the flow using the following formula: Figure 96: Required flow Note: If you do not know the outlet temperature, assume it to be 10°F (6°C) above the inlet temperature. 2. Use Figure 98 and the following steps to determine refrigerant head pressure rise above the valve opening point (P RISE ). a. The valve closing pressure (P CLOSE ) is equal to the refrigerant pressure at the highest ambient temperature that the refrigeration equipment experiences in the Off cycle. To find this pressure, use a pressure-temperature chart for the selected refrigerant. 266 Refrigeration Products Catalog

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