SRM Tec Semi Hermetic screws compressor for NH3

[Matjecito]

Hi engineers around the globe.......
Someone already experience with the SRM screw compressors from Fujian Snowman, looking for the SRS semi-hermetic compound two-stage screw compressor as it has some benefits opposite other screw compressor suppliers special regarding COP & maintenance costs.
Looking for a new NH3 application to the SRS-16L (one stage) or SRS-16LS (two stage), but a bit afraid of this "new" brand opposite the main screw pack suppliers like Mycom and Sabroe.

See below some details for the compressors :

Single stage hermetic type :
http://www.snowkey.com/en/index.php/.../detail/id/127

Two stage hermetic type :
http://www.snowkey.com/en/index.php/.../detail/id/130

Thanks your comments to have at least some feedback from the field