AFP High Performance GC Diaphragm Valve  

AFP High Performance GC Diaphragm Valves are available in a variety of configurations to meet customer specific needs. Different valve head materials are available, such as：316 stainless steel, Hastelly, Monel, PEEK, PTFE.

Also provide surface treatment needs, such as：SilcoNert 2000 and Dursan. The pressure is generally 150 ~ 500psi, but an additional specification of 1500psi can also be requested. Driver pressure is normal at 65psi, but can be lower as required by the customer.

  Five Series  

ELDV1：Standard level of performance, optimized for cost sensitive applications.

ELDV-1 SERIE
Purge Standard Miniature Diaphragm Valve        6 and 10 ports with optional internal sample loop
Low temperature version：maximum temperature up to 100°C Pressure：up to 150psi Hole Size：1/16" and 1/8" Cross ports leak rate @ maximum pressure: 9.0 x 10-9 atm-cc/sec He

ELDV2：High performance level, better leak performance and lifetime, at medium cost.

ELDV-2 SERIE
Purge High Performance Mini Diaphragm Valve         6 and 10 ports with optional internal sample loop
Low temperature version：maximum temperature up to 100°C Medium temperature version：maximum temperature up to 180°C Pressure：up to 300psi Hole Size：1/16" and 1/8" Cross ports leak rate @ maximum pressure：4.7 x 10-11 atm-cc/sec He

MDVG：Premium performance grade, low、medium and high temperature grade.

MDVG SERIE
Purged Top Performance Mini Diaphragm Valve         6 and 10 ports with optional internal sample loop
Low temperature version：maximum temperature up to 100°C Medium temperature version：maximum temperature up to 180°C High temperature version：maximum temperature up to 250°C Pressure：up to 500psi Hole Size：1/16" and 1/8" Cross ports leak rate @ maximum pressure：3.0 x 10-12 atm-cc/sec He

MDVG-ISL SERIE ( Internal sampling loop )
Internal sample loop：0.5、1.0、1.5、2.0、3.0 or 5.0µl Simultaneous or alternate injection possible with 10 port valve With 10 port valves, one internal and one external sample loop can also be selected on the same valve head Can also be used on ELDV modules

DADV：Double Actuated Diaphragm Valves allow independent control of the "N.O. normally opened" and "N.C. normally closed" pistons.

DADV SERIE ( Double Actuation GC Diaphragm valve )
Independent normally open and normally closed drive (each hole can be opened and closed at the same time)
Purged Top Performance Mini Diaphragm Valve        6 and 10 ports with optional internal sample loop
Low temperature version：maximum temperature up to 100°C Medium temperature version：maximum temperature up to 180°C High temperature version：maximum temperature up to 250°C Pressure：up to 500psi Hole Size：1/16" and 1/8" Cross ports leak rate @ maximum pressure：3.0 x 10-12 atm-cc/sec He

CADV：Cam-Actuated Diaphragm Valves allow rotary valve systems to be upgraded without changing the existing drive. For the first electrically driven GC diaphragm valve.

  Unique Purge Design  

A. Elimination of emissions and internal / external leaks

B. Eliminates permeation / diffusion problems of the diaphragm

• No more negative peaks.
• Suitable for measuring low concentrations of impurities.

C. Suitable for GC / MS system vacuum applications and sub-atmospheric pressure applications

D. Safe handling of hazardous gases

E. Built-in purge flow restrictor eliminates the need to install an external flow restrictor to modify the purge flow

  Valve Head Module  

A. 6 or 10 ports

B. Internal sample loops：0.5、1.0、1.5、2.0、3.0、5.0µl

C. Dual sample loop：

• Alternate or simultaneous injection.
• Sample loops of different sizes can also be used on the same valve.
• An internal and an external sample loop are also available on the same valve head.

D. Material：SS-316L ( Standard ) / polymers / Hastelloy / Monel / Titanium etc.

E. Coating：Sulfinert ( Passivation treatment ) / Gold / Tantalum etc.

F.  1/32"、1/16"、1/8" VCR or welded pipeline or a combination of various pipelines can also be integrated on the same valve head

  Drive Selection  

A. Basic features

• There is no problem of flow mixing on the drive ( switching and mixing of carrier gas and sample ), so as to eliminate the mixing problem that does not want to occur on the drive.
• Unique relief pins design： The sample and diaphragm can be replaced quickly, and the diaphragm will not be deformed after a long time of placement.
• Tightened piston design：Allowing the valve to operate in a strong vibration environment or in any position can also extend the service life of the product.

B. Three driving structures

    Standard drive

• Single operation、single injection port, gas drive.

    Dual drive structure

• Independently control the " N.O. normally opened " and " N.C. normally closed " pistons.

    Cam Actuator ( for the first electrically actuated diaphragm valve )

• There are different traffic exchange regimes.
• The driving method can be manual or any rotary drive ( also electric drive ).
• Can be installed on existing rotary pneumatic / electric actuators to retrofit AFP valves.

  Diaphragm design  

A. Multilayer membrane

B. Optional coating / metallization ( according to customer requirements )

C. Material selection ( according to customer requirements )