Kofloc Model 6600 Pressure Regulating Valve

The KOFLOC Model 6,600 Series of pressure regulating valve is specifically constructed to cater a wide array of applications. It comes in a compactly made and lightweight design.


The KOFLOC Model 6,600 Series of pressure regulating valve is specifically constructed to cater a wide array of applications. It comes in a compactly made and lightweight design. It serves as a panel mount unit purposed for an easy adaption into sensitive analytical machines.

The sections of the pressure regulating non-bleed valve are keenly polished before assembly. It has underwent several test and procedure to ensure its serviceability. This enables the entire series to be ideal for utilization as a unit of a high-sensitivity devices.

This is a compact, lightweight precision pressure regulator with superior repeatability to provide reliable and speedy regulations. Since all the components are perfectly cleaned before assembly, this model is ideal for high-sensitivity instruments for analysis required for activities.

Through the KOFLOC several years of experience in producing, flow instruments, the Model 6,600 Series are made to suit various operations. It features its cleanliness, leak-integrity and assimilation properties. It is built with a repeatability to supply a quick and reliable regulations.




The natural environment is preserved through the balance of solids, liquids and gases that exist on the earth. However, human civilization has caused pollution that has greatly damaged our environment. The task of the present generation is to restore our environment to its natural healthy state. And this is also the greatest challenge for 21st century science and technology.

KOFLOC's corporate motto is "A Scientific Approach for Fluids." In other words, we create products that scientifically measure and control the balance of liquids and gases. We trust that through our work we are making a contribution to the regeneration of the environment and to the establishment of a prosperous society.


  • High-precision control characteristic

High control performance with repeatability within a range of ±1% against fluctuations in pressure on the primary side and load resistance variations on the secondary side

  • Perfect for panel mounting

Flow inlet and outlet are located on the back of the product to facilitate easy pipe connection. Additionally, it is compact in size and light in weight, ideal for panel instrumentation systems.

  • Bleed-free

All units are subjected to a rigorous leak test before shipping though the product is bleed-free.


  • Gas chromatographs
  • Scientific instruments
  • Gas mixing systems in various fields


Model 6600A 6600B 6600AL 6600BL
Maximum primary pressure 0.8MPa
Secondary control pressure 0.01–0.3MPa 0.03–0.6MPa 0.01–0.3MPa 0.03–0.6MPa
Minimum operating differential pressure 0.05MPa
Proof pressure 0.8MPa
Repeatability Within ±1% of the pressure rating
Temperature characteristics Within ±1% of the pressure rating per 10℃
Heat resistance 5℃-60℃
Flow rating See the graph.
Connection end Rc 1/4 (standard), Rc 1/8
Materials of parts in
contact with fluids
(A) Al, brass, NBR, POM, SUS316
(SS) SUS316, FKM, fluorocarbon resin


Optional Specifications

  • Set pressure lock nut
    • Joints other than the standard ones
    • Press fitting of the OUT side filter

Additional Information

Model No. Pressure setting Max. flow
6600A 0.01–0.3 MPa 10L/MIN
6600B 0.03–0.6MPa 10L/MIN
6600AL 0.01–0.3MPa 20L/MIN
6600BL 0.03–0.6MPa 20L/MIN

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