Water park projects 1. Suitable for hotel, school, swimming pool, sub district; 2. ... tube for heat transferring. When the discrepant temperature of the solar collector and water tank reaches the set value, the controller ... steel / aluminum alloy, durable and stability performance, well wind resistance solar vacuum tubea) Size: Φ47x1, 500mm / Φ58x1, 600mm / Φ58x1, 800mm;b ...