... supply,exhaust system,and one-way valve.It's a use of air pressure to diaphragm moves ... fluid volume pumps. The pump can be applied to all solid particles of less than ø2.5mm pump ... ,dope industry,transport and enviromental protection.Because it's full-enclosed design,will not leak.In the ... rubber. Can also be based on the user's requirements,all stainless steel production,or alter the lining material ...