Application and Selection of Expansion Valve

Thermal expansion valve has more than 80 years of application history, can be described as the refrigeration industry, "evergreen"; and electronic expansion valve instead of thermal expansion valve is a voice. Thermostatic expansion valve VS electronic expansion valve, how to choose according to the application? How to solve the electronic expansion valve control costs?

March 24, 2017 • China Cold Expo Jinan Road and Shandong Refrigeration Elite Association, "Zhejiang Sanhua invited you to discuss the expansion valve application and choice"! Site technical solutions, invites you to visit!

First, the thermal expansion valve

Product Introduction

Excellent thermal expansion valve under a certain load can accurately control the system superheat control, while achieving the best steady-state superheat, of course, the expansion of the diaphragm and filling design put forward a very high demand. Three-color RFKH thermal expansion valve with stainless steel capillary and temperature package, good toughness, and its excellent diaphragm and filling design to -40oC to +10 oC in the evaporation temperature range to ensure the same superheat control performance, Can be adapted to different temperature areas of refrigeration equipment, whether it is laboratory, or cold storage, display cabinet site, RFKH have demonstrated world-class performance.

Second, the electronic expansion valve

Electronic expansion valve using stepper motor control flow, thermal expansion valve control hysteresis is small, high precision, when the system load changes, the electronic expansion valve control advantage will be more obvious, he can 10-100% load changes To ensure accurate overheating control.

The full range of electronic expansion valves and their control solutions, including the DPF series of electronic expansion valve, cooling capacity from 2kW to 105kW, 500 steps to accurately control the amount of refrigerant; SEC601 expansion valve controller, the use of advanced PID Control logic to ensure that the superheat fast and stable; YCQ-type pressure sensor with 0.8% FS integrated accuracy will be combined with the SEC601 superheat control in the set value of +/- 0.5K.

Enterprise recommendation

Sanhua always adhere to research and innovation, put a lot of experimental equipment, not only to ensure product performance, but also to ensure system matching. Sanhua constantly enrich the product line, to ensure that the product line to lead the industry's development direction and technology and process innovation to ensure product competitiveness, the product "zero defect" as the eternal pursuit of the goal, to create the greatest value for customers.