SwissFluid

Fully lined ball valves for shut-off and control of corrosive and permeating liquid or gaseous media, with a Class 300 version for higher pressure.

Use it whenUse it when you need tight quarter-turn shutoff on aggressive chemical service and the whole wetted path has to be fluoropolymer. Go to the Class 300 version when the line class demands it -- do not try to stretch the standard body.

Butterfly valves with elastomer sealing. Swissfluid lists liner materials including EPDM, white EPDM, NBR, FPM (Viton), VMQ silicone and SBR, with disc encapsulation in PFA, PFA-AS, PVDF or ETFE, and describes them as well established process valves used in chemical, petrochemical, pharmaceutical, pulp and paper and mining service.

Use it whenUse it when the medium is a lower-concentration acid or alkali, especially one carrying solids, and an elastomer liner handles it. Cheaper and more forgiving of particulates than a fluoropolymer-lined body. Pick the elastomer from the chemical compatibility data, not by habit.

Butterfly valves with body liners in PTFE, PTFE-AS anti-static, PTFE-T for vacuum service, UHMWPE or PVDF, and disc encapsulation in PFA, PFA-AS, ETFE or polypropylene.

Use it whenUse it in place of the SBE when the chemistry is too aggressive for an elastomer. Note the specific liner variants solve specific problems: PTFE-AS where static discharge is a hazard, PTFE-T where the line sees vacuum. Choosing plain PTFE on a vacuum service is a classic mistake.

Fully lined weir-type diaphragm valves for shut-off, throttling or control of corrosive liquid or gaseous media.

Use it whenUse it when the medium must not contact anything but the lining and the diaphragm, when you need throttling as well as shutoff, or when solids and slurries would jam a rotating ball. Weir-type diaphragms also drain and clean well.

Lined cylindrical plug valves.

Use it whenUse it where you want a plug valve's rugged, self-cleaning quarter-turn action on lined service, particularly on media that would coat and seize a ball.

Lined non-return valves in ball and swing designs.

Use it whenUse a lined check valve wherever backflow must be prevented on corrosive service. Ball checks suit smaller lines and vertical runs; swing checks suit larger horizontal lines with lower pressure drop.

Ball-type sampling valves for taking media from a pipeline into a laboratory bottle.

Use it whenUse it as the basic point-of-sample device on a lined line -- when you need a sample and a plain bleed valve would expose the operator or fail to give a representative draw.

Sampling valves that mount inline in the pipe.

Use it whenUse it when the sample has to be drawn from the flowing stream rather than a dead leg, which is the only way to get a truly representative sample on a stratified or settling medium.

Complete sampling systems built around Swissfluid's sampling valves.

Use it whenUse it when you want the whole sampling function engineered as an assembly rather than assembling valves, bottle holder and containment yourself.

Sampling systems combining multiple functions in one unit.

Use it whenUse it where one location must do more than a single simple draw -- multiple points, purge, or return.

Sampling stations, that is, a fixed installed point where operators take samples.

Use it whenUse it when sampling is a routine, repeated operator task at a fixed location and you want consistency and containment built into the station rather than depending on technique.

Manual sampling systems designed for taking samples from a reactor.

Use it whenUse it when the sample point is a batch reactor rather than a pipeline -- reactor sampling has different access, pressure and containment problems than inline sampling.

Automated reactor sampling systems.

Use it whenUse it when reactor sampling must happen on a schedule or a recipe step without an operator at the vessel, or when the medium is too hazardous to sample by hand.

Pneumatic rotary actuators for Swissfluid quarter-turn valves.

Use it whenUse it to automate an SBV, SBE, SBP or SCP. Buying the actuator with the valve avoids mounting and torque mismatches on lined bodies, where over-torquing is a real risk to the lining.

Pneumatic linear actuators for stroke-type valves.

Use it whenUse it to automate the SDV diaphragm valves, which need linear rather than rotary motion.

Lined sight glasses, in standard and tubular forms.

Use it whenUse it when an operator has to see the medium -- confirm flow, check color, verify a line is empty -- on service where an unlined sight glass would be attacked. Tubular versions give a longer view of the stream.

Customer-specific linings and moulded components.

Use it whenUse it when a standard catalog item does not fit the geometry or the chemistry. Swissfluid will line or mould to a specification, which is worth knowing before anyone designs around the problem.