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Gradient forming devices - Gradient Valves

valve gradientSEPARMIX V is a series of gradient valves different size and number for low pressure gradient forming. They are designed to be controlled either from a pump SEPARTRIX PP03 G or from a single programming unit. Special solenoid valves made by ASCO SCIENTIFIC can be used for the control of even aggressive liquids in the pharmaceutical, chemical and biochemical industries. The valve is suited for all applications in which the fluids must not come into contact with the metal parts (electromagnetic control of the solenoid valve). Bellows system made of  PTFE and FFPM perflourelastomere seals with high functional reliability and long service life.

Each set of valves is completed by manifolds on the input and output to allow the connection to the liquid reservoirs on one side and to the chromatography pump on the opposite side. A set of valves is inserted into a stainless steel box with a cooling fan in order not to overheat valves and not to increase liquid temperature and to prevent bubbles generation. Only inputs and output of liquids and electrical cable are going through box walls.

There are two dimensions of gradient mixer valves sets - for smaller or big flow rate. Both are equipped with valves having the same design but different dimensions. Maximum liquid viscosity  to be used with mentioned valves systems is 40 cSt (mm2/s) and temperature range -10 °C to +90 °C (seal FFPM perfluoroelastomer). Material in contact with fluid are: PEEK (polyetheretherketone), stainless steel, FFPM and PTFE. Max input pressure is 2 bars. Maximal flow rate for smaller valves (S serie) is 0,5 l/min, max. flow rate for bigger version (L serie) is 3 l/min. Units are delivered with 3 or 5 valves. Other configuration is possible as an option. Connection is usually 1/4" (S version) or 3/8" (L version) inner thread. Other connections are possible as option and have to be specified.

Type

Specification

SEPARMIX V3S

Gradient mixer - valves unit, max. flow rate 500 ml/min., 3 solenoid gradient valves set in a box, valves made of PEEK, nonwetted magnetic kern (membrane), wetted parts PEEK, stainless steel, PTFE

SEPARMIX V5S

Gradient mixer - valves unit, max. flow rate 500 ml/min., 5 solenoid gradient valves set in a box, valves made of PEEK, nonwetted magnetic kern (membrane), wetted parts PEEK, stainless steel, PTFE

SEPARMIX V3L

Gradient mixer - valves unit, max. flow rate 3000 ml/min., 3 solenoid gradient valves set in a box, valves made of PEEK, nonwetted magnetic kern (membrane), wetted parts PEEK, stainless steel, PTFE

SEPARMIX V5L


Gradient mixer - valves unit, max. flow rate 3000 ml/min., 5 solenoid gradient valves set in a box, valves made of PEEK, nonwetted magnetic kern (membrane), , wetted parts PEEK, stainless steel, PTFE