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Floating ball valves close on a simple principle: line pressure pushes the bored ball against the downstream seat, so tight shutoff comes without trunnion hardware. The range covers a cast floating…

Trunnion-mounted ball valves carry the ball on fixed upper and lower trunnions, so line pressure cannot push the seat and operating torque stays controlled as size and class grow. That is the…

Fully welded ball valves join the body halves by weld instead of bolted flanges, removing the body joints that leak or need re-tightening on buried, district-heating and gas-distribution lines. The…

Top-entry ball valves are serviced through the top cover, so seats, seals and the ball can be inspected or replaced with the valve left in the line — the maintenance argument for inline-inspectable…

Jacketed ball valves wrap the body in a steam or thermal-oil jacket so wax, asphalt, sulfur, polymer and other media that solidify on cooling stay fluid through the valve. The series specifies an…

Double block and bleed ball valves give two seating surfaces and a bleed port between them, so a single valve can isolate downstream and upstream pressure and verify cavity Vent — the isolation…

Two-piece ball valves swing a bored ball between open and closed inside a body split into a pressure-bearing main casing and a trim-carrying end piece — the bolted or threaded two-part construction…

Three-piece ball valves hold the ball and seats in a center section clamped between two end caps, so the whole trim lifts out for service without cutting the valve from the line — the maintainability…

Wafer ball valves clamp the short-cased body between pipeline flanges instead of carrying their own flanges, cutting face-to-face length, weight and cost on general isolation duty where the slim body…

V-notch segment ball valves rotate a segmented ball with a shaped V notch through 90°, so the notch edge shears against the seat while the ball turns — good control and cut-off performance on fibrous,…

Bellow seal gate valves replace the stem packing as the primary seal with a welded metal bellow between bonnet and stem; the bellow stretches and compresses with stem travel, so no stem movement can…

Pressure seal gate valves use a bonnet seal that internal pressure itself tightens: above roughly Class 900 the push of the line media forces the pressure-seal gasket outward against the bonnet…

Forged steel gate valves are the compact small-bore isolation valve of process piping: forging gives a denser grain structure than casting at DN50 and below, which is why Class 800 to 2500 small-bore…

Knife gate valves cut through pulp, slurry, chip and other media that would jam a wedge gate: a thin blade-style disc with a sharpened edge drops through the medium and seats into a soft seal ring,…

Rising stem gate valves lift the stem visibly as the wedge travels, so the open/closed position reads from outside the valve — the standard choice where above-ground installation makes position…

Non-rising stem gate valves rotate the stem in place so the wedge travels along the stem thread without the stem rising — the compact choice for buried service, chambers and tight headrooms where no…

Wedge gate valves close on a tapered solid or flexible wedge that wedges against the seat rings, so sealing force grows with hand torque — the general-purpose isolation valve for lines that stay open…

Parallel slide gate valves seal positionally: a spring presses two parallel closure members together for low-pressure seating, then rising line pressure pushes them against the seats so the seal…

Through conduit slab gate valves slide a single flat gate that, when open, leaves a smooth full bore — minimizing pressure drop and keeping slurries and solids from accumulating in the valve cavity,…

Expanding gate valves seal mechanically: the gate assembly expands outward against both seats on closure, giving a bi-directional torque-based seal independent of line pressure, while the assembly…

Y-type globe valves angle the seat chamber away from the flow path so the moving parts sit in an oblique body leg, cutting straight-through pressure drop while keeping the positive seating of a globe…

Angle globe valves turn the flow 90 degrees inside a single body, combining a stop-isolation seat with an elbow so one fitting does the work of two on corner positions in steam, condensate and process…

Bellow seal globe valves add a welded metal bellows around the stem so the primary stem seal is a metallic barrier rather than packed gland alone — the usual answer where fugitive emissions or…

Pressure seal globe valves seal the bonnet joint with the line pressure itself — the higher the internal pressure, the harder the gasket loads, which is why the design owns the top of the pressure…

Forged steel globe valves use a forged, refind-grain body instead of a casting, giving the compact high-integrity isolation trim used on small-bore high-pressure lines in power, petrochemical and…

Swing check valves stop reverse flow with a hinged disc that swings open under forward flow and falls back onto the seat when flow slows or reverses. The range covers a flanged and buttweld series at…

Dual plate check valves carry two spring-loaded semicircular plates on a centre hinge, so the plates close over a short travel while flow is still decelerating — the usual answer where slam and water…

Lift check valves raise a piston or ball straight off the seat under forward flow and let gravity seat it on reversal, giving a short, positive stroke suited to compact high-pressure lines. The range…

Tilting disc check valves pivot a disc on an offset shaft, so the disc opens early under low forward flow and tilts closed with the flow rather than against it — the design large water and utility…

Pressure seal swing check valves use the line pressure itself to load the bonnet gasket, which is why power and high-pressure process plants use them where bolted-bonnet construction would need heavy…

Axial flow check valves close a spring-assisted, streamlined disc along the flow axis, so reverse flow is arrested before it can accelerate and slam — the no-water-hammer choice for high-velocity…

Foot valves are check valves fitted at the intake of a suction line, holding pump priming by stopping the column from draining back when the pump stops; an internal strainer mesh keeps debris out of…

Triple-duty valves fold three pump-discharge functions into one quarter-turn body - calibrated flow balancing, non-slam check, and positive shut-off - cutting mechanical-room space, installation…

Silent check valves stop reverse flow before it can accelerate: a spring-assisted disc travels a short stroke and seats quietly, avoiding the slam and water hammer of conventional swing checks — the…

Wafer butterfly valves sandwich between the line flanges, giving pipeline isolation with the shortest face-to-face and lowest weight per diameter of the common shut-off choices. The range covers a…

Lug butterfly valves carry threaded lugs around the body so the disc can isolate one side of the line while the other stays flanged off — the dead-end service and easy-section-removal version of the…

Double flanged butterfly valves bolt to the pipe on both faces with their own integral flanges, so they suit buried, water-works and pump-station lines where a wafer body cannot be trusted to carry…

Double offset butterfly valves move the shaft off both the centreline and the plane of the seat, so the disc lifts clear of the seat almost immediately on opening and rubbing wear drops sharply…

Triple offset butterfly valves add a third, conical geometry to the double-offset disc so the seat touches only at the final degrees of closure — metal-to-metal sealing with no rubbing, which is what…

Concentric butterfly valves keep the stem centered in the disc and the disc centered in the bore, so the rubber-seated disc bears evenly all round — the economical, lightweight quarter-turn choice for…

Jacketed butterfly valves keep media that solidifies, crystallises or thickens at ambient temperature in a flowable state: the body carries a full heating jacket through which steam, thermal oil or…

Cast iron diaphragm valves isolate or throttle utility flows by pressing a flexible diaphragm against a weir, so the wetted metal stays out of the medium — the body only backs the lining and elastomer…

Ductile iron diaphragm valves put a higher-strength body behind the same weir-sealing idea: a flexible diaphragm meets a body weir so the elastomer and lining — not the pressure shell — carry the…

Weir-type diaphragm valves seal the flexible diaphragm against a raised weir built into the body, so the short stroke and supported diaphragm suit throttling and corrosive, erosive or solids-laden…

Straight-through diaphragm valves run the flow path through an unobstructed, nearly straight bore that the flexible diaphragm presses down onto, so viscous media, slurries and suspended solids pass…

Needle gauge valves isolate pressure instruments from the process, in three-port and block-and-bleed designs so gauges and transmitters can be removed or vented without shutting the line down. The…

Integral bonnet needle valves serve instrument and general-purpose metering duty where frequent packing maintenance is unwelcome: the bonnet is part of the body, and live-loaded chevron packing holds…

Lower packing needle valves place the stem packing below the stem threads, keeping lubricant on the threads and corrosive or erosive media away from them — positive shut-off for higher-flow…

Rising plug gauge valves use a soft-seated, straight-through rising-plug trim instead of a needle stem, so dirty or viscous media can be rodded through and the seat resists clogging — gauge isolation…

Locked bonnet needle valves clamp the bonnet to the body through a machined metal joint held by a locking ring, so vibration, packing adjustment or an over-rotated stem cannot disassemble the bonnet —…

Lubricated plug valves keep a waxed seal between plug and body: injected grease compounds follow the sealing faces, cutting operating torque and letting a tapered plug wipe clean through gritty or…

Sleeved plug valves seat a tapered plug inside a compression sleeve — typically PTFE-based — that laps against the plug face and keeps the line sealed without injected sealant, which is what earns…

Jacketed plug valves carry a heating jacket over the valve body so line steam or thermal fluid can hold waxy, freezing or heat-sensitive media above their pour point while the plug throttles or…

Three-way plug valves port two inlets and one outlet (or the reverse) through a single plug, so a diverging or converging flow switch happens at the valve instead of in a tee of two-way isolators —…

Eccentric plug valves swing a rounded plug into an offset seat, camming it firmly against the face only in the closed position — so the seat wipes rather than scrapes on every stroke and keeps sealing…

Orbit plug valves lift the plug off the seat before rotating it, so the sealing faces rub only through the last fraction of travel — the rolling-and-cambering motion that keeps a tight shut-off…

Twin seal plug valves wrap a PTFE sleeve seal around the plug so two sealing lands bear on the body at once — a double-direction, zero-leakage shut-off on pipeline, terminal and chemical-transfer…

Four-way plug valves turn a multiple-port plug through 90° to divert flow between four pipe connections in one valve — throttling and diverting service that would otherwise need a fittings cluster of…

Full lift safety valves pop wide open once set pressure is reached, dumping the full orifice area so accumulated pressure collapses fast on compressible or two-phase service around boilers, receivers…

Low lift safety valves open only a fraction of the seat diameter, releasing a measured slip of fluid along a seat face — the proportionate behaviour that suits liquid-filled systems and duty where a…

Steam safety valves guard boilers and steam headers, venting overpressure flashes before they can lift a vessel rating — sized on the inlet-by-outlet paired flanges that let a small inlet serve a…

Balanced bellows safety valves hold set pressure stable where back pressure would derate a conventional spring-loaded relief valve: a bellows isolates the spring and disc guide from the discharge…

Pilot-operated safety valves pair a main valve with an external pilot: the pilot senses line pressure and controls the main valve, giving full lift at set pressure with short blowdown while staying…

Direct acting pressure reducing valves balance downstream pressure against a setting spring in a single compact body, so no pilot line or external sensing is needed — the simple response that suits…

Pilot operated pressure reducing valves let downstream pressure act on a large diaphragm through a small pilot valve, so a compact body modulates high flows with accuracy a direct spring cannot hold —…

Steam pressure reducing valves drop live or saturated steam from a high-pressure header to the steady lower pressure that equipment, tracing and heating stations actually use, holding the outlet…

Water pressure reducing valves hold a fixed downstream pressure in building supply, fire-protection and distribution networks, protecting fixtures and meters from the high upstream pressures a rising…

Pressure relief / sustaining valves guard upstream pressure: a normally-closed pilot senses the inlet line, the main valve stays closed while upstream pressure is below the pilot setting, and above…

Float control valves open and close on the level a float pilot reports from the tank, filling reservoirs and break-pressure cisterns to a set line and shutting off without pumps short-cycling. The…

Surge anticipator valves are pilot-controlled diaphragm valves that open on a pressure-rise transient and dump the surge to atmosphere or return line before it can build — protecting long pumping…

Single-seated control valves use one seat and one plug inside a globe body, giving tight shutoff and simple, well-characterized trim — the standard general-purpose modulating valve where a single…

Cage-guided control valves guide the plug inside a perforated cage that both centers the trim and acts as the flow-characterizing element, giving stable guidance, cavitation/noise control options and…

V-notch segment control valves throttle with a notched, segmented ball that shears progressively through the seat as it rotates, keeping a characterized flow curve at small openings while the wedging…

Bellow-seal control valves seal the stem with a welded metal bellows instead of a packing box, removing the dynamic leak path entirely for hazardous, toxic or fugitive-emission service — the choice…

Angle control valves turn the flow path through 90 degrees inside a single body, combining the modulating trim of a globe control valve with the geometry of an angle valve — the standard choice where…

Three-way control valves combine or divert two flows inside a single modulating body — converging for mixing two streams to a controlled outlet, diverging for splitting one stream — replacing a piping…

Double-seated control valves balance the fluid pressure across two plugs in opposition, so the actuator works against a fraction of the unbalanced force of a single seat — the choice for large…

Sleeve-type control valves throttle through a perforated sleeve that characterizes flow and contains cavitation and noise at the trim instead of in the piping, with the plug guiding inside the sleeve…

Single orifice air valves vent accumulated air from liquid lines through one small orifice: a stainless float drops as air gathers in the chamber, opening the seat to release the pocket, then rises…

Double orifice air valves pair a large-orifice stage with a small-orifice stage in one body: the large stage discharge bulk air while pipelines fill and admit air while they drain, and the small stage…

Combination air release valves pair an air/vacuum function with a continuous air-release function in one assembly: they exhaust large air volumes at pipeline start-up, release accumulated air pockets…

Y strainers fit inline like a check valve, their angled leg holding a perforated or mesh screen that catches weld beads, scale, sand and other debris ahead of pumps, control valves, meters and steam…

Simplex basket strainers house a single removable basket in a vertical-chamber body: flow passes into the basket, debris stays behind, and clean liquid leaves the outlet — cleaned by opening the cover…

Duplex basket strainers put two straining chambers and a changeover valve in one assembly, so one basket keeps working while the other is switched in and cleaned — continuous flow protection where a…

Air operated pinch valves close and modulate by feeding compressed air into the valve body around a reinforced elastomer sleeve, so the media touches nothing but the sleeve while actuation stays fully…

Mechanical pinch valves compress the elastomer sleeve with a horizontal bar driven by an adjusting mechanism — handwheel, pneumatic cylinder, hydraulic cylinder or electro-mechanical actuation —…

Control pinch valves are the normally-closed pinch-valve variant: compressed air opens the sleeve against a spring return, and venting the air lets the valve fail safely closed — the standard choice…

Plunger control valves regulate large water flows through a cylindrical plunger moving against slotted ports in a one-piece streamlined body, giving cavitation-free modulation for water transmission,…

Double regulating valves are static balancing valves with a calibrated handwheel and positive stop: the setting can be preset, locked and reopened to exactly the same position, which is what hydronic…

Fixed orifice double regulating valves add a calibrated orifice to the double-regulating trim, so flow is read from the differential pressure across a fixed restriction — the manufacturer notes the…

Variable orifice double regulating valves balance on the valve's own variable restriction rather than a fixed orifice, in the larger flanged sizes where a separate flow-measurement device would…

Flow measurement devices pair with balancing valves to read circuit flow at a dedicated fitting — a separate measurement point where the regulating valve itself has no fixed orifice, or a combined…

Ball valves isolate pipelines with a quarter turn: a bored ball rotates between open and closed, giving fast operation, tight seating and a full-bore path with low pressure drop when open. The family…

Gate valves shut off by raising a wedge out of the flow path, so a fully open line runs with almost no obstruction. They suit isolation duty in oil and gas, steam, water and process lines where the…

Globe valves regulate flow by seating a disc perpendicular to the flow path, which trades some pressure drop for precise throttling. They fit steam, condensate, feedwater and chemical lines where…

Check valves open with forward flow and close automatically against reverse flow, protecting pumps, compressors and piping from backflow and surge. The range includes swing, dual plate wafer, single…

Butterfly valves turn a disc a quarter turn inside the body, giving a compact, light valve for large diameters in isolation and throttling duty. Offset geometry separates the families: concentric…

Diaphragm valves seal the flow path with a flexible membrane pressed against a weir or straight-through body, so only the diaphragm and the body lining ever touch the medium — the actuator is…

Needle valves meter flow through a long tapered stem and fine orifice, giving precise adjustment at instrument scale. The range covers DN3 to DN25 (1/8 to 1 inch) with typical orifices of 1.5-8 mm,…

Plug valves stop or divert flow by rotating a tapered or cylindrical plug inside the body, with lubricated designs injecting a sealant that performs four functions (seating, lubrication, sealing,…

Safety valves open automatically at set pressure and relieve boilers, vessels, compressors and piping before overpressure becomes failure. The family lines are full lift, low lift and steam types in…

Pressure reducing valves hold a steady downstream pressure below an upper upstream pressure, protecting piping, equipment and steam traps while cutting energy loss. The range covers direct acting,…

Control valves modulate process flow through characterized trim under pneumatic or electric actuation, holding temperature, level, pressure or flow at setpoint. The range covers DN20 to DN400, PN16 to…

Air valves vent gases that collect at high points and admit air when pipelines drain. Combination units pair a large orifice that exhausts or admits bulk air during filling and draining with a small…

Strainers intercept solid particles ahead of pumps, control valves, meters and instruments, trading a small pressure drop for protection against blockage and erosion downstream. Y-type strainers suit…

Pinch valves close by squeezing a rubber sleeve between two platens, so the media touches only the sleeve — no seat, no packing, no cavity for solids to pack into. That makes them a fit for abrasive…

Plunger valves reduce pressure by passing flow through the annular slots between a cylindrical plunger and a slotted diffuser cage, dissipating energy inside the body where cavitation cannot attack…

Manual balancing valves are double-regulating valves: a calibrated handwheel sets and holds a flow memory stop, so hydronic circuits can be proportionally balanced and later re-checked against the…

Correspondence tables for design, testing and face-to-face standards, each pairing qualified rather than asserted as interchangeable.

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