ZSI(2HP to 7HP) is good choice for freezer(0C to -25C) with freon liquid insjection to cool motor but good price compare with semi hermetic piston compressor.

2)Full hermetic piston compressor: Manuerop (2HP to 30HP) and Tecumseh(1HP to 6HP) compressor.(Made in France)

Manuerop & Tecumseh are good choice for cold room freezer with -18C and better price compare with semi hermetic piston compressor and stable good quality.we have customer use Tecumseh and Manuerop for more than 13 years and still working good.

3)Semi hermetic compressor piston compressor: Bitzer(2HP to 40HP)/Copeland(2HP to 40HP)/Frascold(2HP to 50HP)/Carrier(3HP to 40HP)China Brand(2HP to 40HP).

They have different temperature range condition for same power with different price. For example: 15HP Bitzer.4PES-15Y is high temperature compressor/4JE-15Y is low temperaure compressor.

Same compressor,R404A will have bigger cooling capacity & Higher pressure in the system compare with R22.

4)Semi hermetic Screw compressor: Bitzer(30HP to 120HP)/Hanbell (30HP to 120HP)/Fusheng(30HP to 120HP).

They have high temperature & low temperature compressor for big cold rooms and water chiller and ice machine.

If you want to know more information.please inform us:

www.chinatechco.com
E-mail: alanwanglq@aliyun.com
WhatsAPP: 0086 15952606481
Mobile phone: 0086 15952606481
Skype: alanrefrigeration