Ball Valve Seat Selection Guide - Triad Process (2024)

FAQs

Ball Valve Seat Selection Guide - Triad Process? ›

Although PTFE can be reinforced using filler materials such as carbon and stainless steel (316), RPTFE refers to when fiberglass is used. Producing RPTFE adds between 15% and 25% fibrous glass to virgin Teflon thereby improving the design life of the valve seat.

Although PTFE can be reinforced using filler materials such as carbon and stainless steel (316), RPTFE refers to when fiberglass is used. Producing RPTFE adds between 15% and 25% fibrous glass to virgin Teflon thereby improving the design life of the valve seat.

TFM1600 - TFM1600 is a modified version of PTFE that maintains the exceptional chemical and heat resistance properties of PTFE, but has a significantly lower melt viscosity. The result is reduced cold flow, porosity, permeability and void content. Surfaces are smoother and reduce torques.

The most popular seating material in these valves is some form of thermoplastic, such as PTFE. PTFE seats work very well because they are soft enough to seal well on to the polished metallic ball, yet firm enough not to blow out of the valve.

To do this, you'll need the following measurement: External measurement of the male thread on the fittings: Similarly, if the external diameter of the male thread is close to a particular size, you'll need a ball valve of the same size. A 2″ external diameter, for instance, would require a 2″ ball valve.

Metal. Metal is a widely used material for making valve seats due to its excellent mechanical properties, high temperature capability, and good corrosion resistance. Metals commonly used for valve seats include stainless steel, bronze, brass, and titanium, among others.

The melting points of PFA and PTFE are 260°C and 327°C respectively. Water absorption and weathering affect PFA more than PTFE, although PFA is superior in salt spray resistance. Finally, the most notable difference between the two is that PFA's dielectric strength is 3 to 4 times higher than PTFE.

FEP, or Fluoroethylenepropylene, is the melt-processable version of PTFE. FEP has very similar properties to PTFE, but has a lower maximum operating temperature of +200°C. However, FEP can be more easily processed and can be easily welded and re-moulded into complex profiles.

What are TFM seats? ›

TFM. TFM 1600, the standard seat in many Flow-Tek valves, is a modified PTFE that. maintains the exceptional chemical and heat resistance properties of conventional.

Modified PTFE (TFM)

It is a fascinating combination of the properties of PTFE and PFA (Perfluoroalkoxy), which is known for its superior mechanical properties. Like PTFE, TFM is chemically inert and has a similar range for continuous usage temperature, as well as similar resistance to water absorption.

There is NO DIFFERENCE. They are both exactly the same thing, the only difference between them is the name. If you require further information about our range of PTFE/Teflon™ seals, please click here or contact a member of the team.

PTFE (P) Made from Virgin Teflon, this is the most common sealing material; its chemical compatibility is excellent for almost all media. Temperature -50°F to 400°F. PTFE Cavity filled Seats Available on request (CF), suitable for filling the void between the body and ball eliminating product build up.

Like valve guides, there are two types of valve seats – integral and insert. Integral seats are part of the casting. Insert seats are pressed into the head and are always used in aluminum cylinder heads. Most pre-1978 integral seats are soft cast iron.

Ball valves are installed throughout piping systems to allow, obstruct, and control the flow of various vapors, gases and liquids. The ball is mounted against two seats and is connected with a shaft to the control mechanism used to rotate the ball.

Ball valves are typically labeled in inches for the pipe they will fit, not the ball valves physical size. For example, a 1” unibody ball valve is physically smaller than a 1” 2-pc full port ball valve, but they will fit the same size pipe end.

The first type, the Part 1 float valve, is located on the underside of the cistern. It has a plastic nozzle attached to it. The Part 2 ball valve has a spout that is attached to the top of the valve body. A Part 1 ball valve is not recommended for use in irrigation systems as it has no water level adjustment mechanism.

There are four general types of ball valves: full port, standard port, reduced port, and v port. A full port ball valve has an oversized ball so that the hole in the ball is the same size as the pipeline resulting in lower friction loss. Flow is unrestricted, but the valve is larger.

A v-port ball valve's flow characteristics are different from that of standard port ball valves. The fluid flow through a v-port ball valve increases linearly with an increase in shaft rotation. V-ball control valves have high strength to withstand the high velocity of fluids flowing through the valves.