Safe Solution for Media Controls

The Gemü 567 Biostar con­trol valve is the new, safe solu­tion for media con­trols from 0.08 to 4.1 m³/h.
The seal­ing takes place via a PTFE diaphragm with PD tech­nol­o­gy (plug diaphragm), which com­bines the advan­tages of a diaphragm valve with those of a globe valve. This valve is avail­able with lin­ear con­trol char­ac­ter­is­tics and with equal-per­cent­age con­trol characteristics.
Asep­tic diaphragm valves are fre­quent­ly used as con­trol valves for ster­ile appli­ca­tions. This means that small vol­umes can only be con­trolled with an inad­e­quate lev­el of accu­ra­cy, or not at all. The new 2/2‑way diaphragm globe valve with reg­u­lat­ing nee­dle or reg­u­lat­ing cone fills these gaps. The actu­a­tor is sealed by an FDA-com­pli­ant and USP Class VI com­pli­ant PTFE diaphragm. In com­bi­na­tion with a spring wash­er, this ensures that the seal is per­ma­nent­ly tem­per­a­ture-resis­tant, mean­ing that the diaphragm need not be re-tight­ened. In com­par­i­son with bel­lows valves, clean­ing the valve is sig­nif­i­cant­ly improved by the hygien­ic construction.
Fur­ther spe­cial fea­tures include the option­al inte­gra­tion of a bypass func­tion and the poten­tial instal­la­tion of the diaphragm globe valve in a mul­ti-port valve block (GEMÜ M‑block). In the bypass ver­sion, the angle valve body can be designed with a man­u­al­ly oper­at­ed bypass or with a pneu­mat­i­cal­ly oper­at­ed bypass. Both ver­sions allow for eas­i­er clean­ing and greater flows.
If the Gemü 567 Biostar con­trol is inte­grat­ed into an M‑block, sev­er­al func­tions can be imple­ment­ed in the small­est of spaces. In addi­tion, the space require­ment is reduced con­sid­er­ably, and the instal­la­tion and weld­ing effort are reduced.
The valve is also opti­mal­ly equipped when it comes to hygien­ic safe­ty: It meets both the stan­dards of the EHEDG clean­ing test and the stan­dards in accor­dance with the Amer­i­can 3A definition.
The con­trol valve is used, for exam­ple, for dos­ing small quan­ti­ties in the bev­er­age indus­try for in-line mix­ers (for exam­ple, for vit­a­mins, dyes and oth­er addi­tives), for con­trol­ling ster­ile steam and air (for exam­ple, for DIP process­es) or for con­trol­ling the inflow and out­flow of biore­ac­tors in the phar­ma­ceu­ti­cal industry
The Gemü 567 Biostar con­trol is avail­able in the nom­i­nal sizes DN 8 to DN 20. The body is man­u­fac­tured, as stan­dard, from block mate­r­i­al with a grade of sur­face fin­ish of Ra 0.4 µm. In addi­tion to the PTFE diaphragm, anoth­er seal made from FKM is used. One excep­tion here is the 3A ver­sion, for which the com­plete seal­ing and con­trol ele­ment con­sists of one piece or mate­r­i­al (PTFE).