Sample Valves & Components

Keofitt Valves come in a variety of different models based on:

• sample type and composition, 
• how the valve is to be connected to the process, 
• what membrane material is most compatible with the sample type and compatibility to the cleaning method – chemicals/temperatures
• how the valve will be cleaned – independent of the process cleaning or dependent on the process cleaning for cleaning supply or return

Keofitt sample valves are basically composed of three main components:

• The valve body
• The valve head 
• The valve membrane

The valve body is selected based on:

• The sample to be taken regarding its ability to flow out of the valve body to take the sample – taking viscosity, the size of particles within the sample, and in general the process pressure to deliver the sample – a good question to ask is, “how are you sampling now and what are you using to do it currently”?
• The process connection the valve will use for the installation
• The sampling method and cleaning method to be used to clean the sample path. In some instances a single port valve can be used if the cleaning method is through the process line whether cleaning solution is supplied by the process line or whether the valve is back-flushed from the valve port into the process line. The sampling port type required for sample taking or connected to cleaning process lines

The valve head is selected based on:

• Every valve head comes with a membrane – of EPDM. Silicone or PTFE material
• The compatibility of the membrane to the sample and the cleaning method of the sample valve
• The type of actuation desired/required for the taking of samples and cleaning of the valve – manual or pneumatic
• The process pressure the valve is to withstand
• Whether the ability of the valve to additionally take syringe samples is required, as a secondary check to the valve-taken sample

The valve membrane is selected based on:

• The compatibility of the membrane to the sample and the cleaning method of the sample valve
• The use of syringe valve head is used
• Please note, every valve head comes with a replaceable membrane.  Soft membranes of EPDM and Silicone are not interchangeable with valve heads initially supplied with PTFE membranes.

An important part of a sampling procedure is the ability to get the sample from the process to the laboratory in a safe and efficient manner and the ability to clean the sample residue immediately after a sample to minimize or eliminate any potential for bacterial growth and subsequent sample contamination.  To achieve this Keofitt offers a number of accessories and equipment to help implement an effective and efficient cleaning and sample collection procedure.

Keofitt valve accessories include:

• Cleaning devices
• Connection fittings, hoses and devices to implement Keofitt valves into your current sampling procedure
• Sample collection single-use bags and cleanable sample bottle collection devices