Industriële ventielen volgens API · ASME · DIN · EN
Knijpkleppen
Kleppen die sluiten door een elastomeerhuls tussen bewegende platen samen te drukken, voor abrasieve, slurry- en corrosieve media waar de natte delen alleen de huls zijn.
Laatst bijgewerkt: 2026-10
Familiespecificaties
| Nominal valve connection size | DN25 to DN150 |
|---|---|
| Pressure class / nominal rating designation | PN10, PN16, 150LB |
| Sleeve Material | Rubber |
| Materials (component scope as published) | Cast iron, Carbon Steel, SS304, SS316 |
| Sleeve End Options | Extended hubs with clamps to slip over pipe ends, or flanged ends to standard dimensions |
| Enclosure Styles | Exposed-sleeve construction is standard; another style fully encloses the sleeve within a metallic body |
| Vacuum Limit | Exposed sleeves have limited vacuum duty (collapse tendency); encased builds can hold vacuum service by applying vacuum within the metal casing |
| Design standards | ANSI, DIN, JIS |
| Inspection and pressure-test standards | BS6755 |
| internals | Stem: Carbon Steel, Platen: Cast Iron, Trolley: Cast Iron, Bracket: Cast Iron, Handwheel: Cast Iron |
| flange dimension standards | ANSI B16.5, DIN3202, JIS |
| working principle | Full-bore (fully ported) control valve that obstructs flow by pinching an elastic sleeve |
| media isolation | Flowing media is completely isolated from any internal valve parts; the sleeve contains the media and reduces contamination |
| air operated self action | Air-operated builds need no actuator: the valve closes as soon as pressurized air enters the body and reopens by process-flow force when the air exhausts |
| construction | A sleeve molded of rubber or other synthetic material plus a pinching mechanism; all operating portions are external to the valve |
| abrasion resistance | Natural and synthetic rubber/plastic bodies give good abrasion resistance; little sleeve damage keeps flow virtually unimpeded |
| encased operation | Encased builds close by wheel-and-screw, hydraulic, or pneumatic pressure within the metal case forcing the sleeve walls together |
| generic envelope | General envelope: maximum operating temperature about 250 °F with pressure typically 100 psig at 1 in. falling to 15 psig at 12 in.; special builds span -100 to 550 °F at 300 psig |
| throttling character | Elastomer-sleeve construction gives smooth venturi flow, centerline closure and good throttling characteristics |
| sleeve selection rule | Sleeve material is selected on media corrosiveness/abrasiveness, with operation temperature kept within the polymer limit |
| execution options | Buried-service designs and options such as AWWA nuts, chainwheels, stem extensions and bevel gear actuators exist at reference executions |
| manual pressure size tiers | manual builds DN15-DN100 rated up to 5 bar, manual builds DN125-DN200 rated up to 3 bar, manual builds DN250 rated up to 2 bar, a DN80-only manual execution rated up to 6 bar, a high-pressure manual series to 400 mm at 1/6/10/16/25/40 bar pressure steps |
| manual pressure span 3 40 | manual pinch valve maximum operating pressure depends on the type and nominal size and spans 3 to 40 bar |
| manual handwheel pinch bar mechanism | manual builds close the sleeve with one or two pinch bars arranged horizontally above and below the sleeve, guided sideways by two rods and driven through a hand wheel |
| manual incrustation breakaway | closing-induced sleeve deformation causes incrustations inside the sleeve to break away, making the manual build practically blockage-free |
| air operating pressure rule | air-operated builds reach a maximum operating pressure of about 2-6 bar depending on the nominal diameter |
| air flanged series dn40 dn300 | air-operated flanged executions use a white epoxy powder coated aluminium body with PN10/16 flanges in sizes DN40-DN300 |
| air connection series spread | multi-connection air builds (flanges, tri-clamps, weld-on ends, threaded spigot, BSP internal thread) DN10-DN150, BSP internal-thread builds in standard black or white food-quality POM, DN10-DN50, socket-connection builds in stainless steel or POM with PVC or aluminium bodies, DN10-DN50, road-tanker semi-silo connection builds in DN80 and DN100 |
| high performance air series 400mm | a high-performance air-operated series extends to sizes up to 400 mm |
| sleeve compound options ako | natural rubber (standard and food quality), EPDM (standard and food quality), nitrile (standard and food quality), silicone, FKM, CSM, neoprene, butyl |
| air accessories list | solenoids, pressure switches, safety arrangements, vacuum systems, quick exhausts, proportional control, pressure regulators |
| elliptical body lip closure | the elliptical body design makes the rubber sleeve close the same way every time, forming a lip shape that gives completely tight shut-off even with large solids |
| air sleeve rebound reopen | when the compressed-air supply is interrupted and the casing vents, the sleeve reopens by its rebound elasticity, restoring full-bore passage |
| hd construction types | heavy-duty pinch valve series are offered in three construction types: open body, enclosed body, and enclosed/sealed body |
| hd size envelope by construction | open-body builds DN80-DN600 (3-24 in), enclosed builds DN25-DN1000 (1-40 in), enclosed/sealed builds DN25-DN800 (1-32 in) |
| hd pressure envelope by construction | pressure envelope 0-25 bar (0-362 psi) on open-body builds and 0-100 bar (0-1450 psi) on enclosed and enclosed/sealed builds |
| hd temp envelope by construction | temperature envelope -25 to +50 °C (-32 to 122 °F) on open-body builds and -25 to +80 °C (-32 to 176 °F) on enclosed and enclosed/sealed builds |
| two pinch bars centerline closure | during closing, two pinch bars squeeze the valve sleeve shut on the center line; in the open position the valve is full bore with no flow restrictions |
| bubble tight solids flaking | bubble-tight shut-off is maintained even with solids built up on the sleeve wall, and compression flakes crystallized particles off the sleeve surface |
| conical sleeve linear control | a conical sleeve improves controllability and produces a linear control curve |
| sleeve only contact replaceable | the sleeve is the only part in contact with the medium and the only replaceable part, changeable on site |
| control sizing iec60534 | control valve sizing for pinch valves is based on the international IEC 60534 standard, harmonized with ANSI/ISA S75 |
| gl size envelope by body | metal-body general-line builds DN50-DN250 (2-10 in), polyamide-blend plastic-body builds DN50-DN150 (2-6 in) |
| gl pressure envelope | both general-line series are rated 0-10 bar (0-145 psi) |
| gl temp envelope by body | metal-body general-line builds 0 to +110 °C (32-230 °F), polyamide-blend plastic-body builds 0 to +70 °C (32-158 °F) |
| gl face to face en558 | face-to-face dimensions follow industry standard EN 558 series 7, giving easy and quick installation |
| gl body opening tags | general-line metal-body builds carry opening tags in the sleeve as standard; the lighter plastic-body variant uses a corrosion-resistant polyamide-blend body |
| no stretch sleeve arches | one tube design uses two joint-like expansion arches that flex instead of stretch when closing, extending sleeve life |
| wear sensor indicator wire | an embedded wear-sensor indicator wire alerts maintenance personnel when the tube is worn, enabling preventive maintenance |
| inline tube change no recalibration | the tube or sleeve can be changed with the valve in line, saving maintenance time and eliminating the need for recalibration |
| self cleaning flexing antijam | the self-cleaning flexing action of the elastomer tube prevents build-up of scaling deposits and keeps the valve from seizing or jamming even with high solids |
| asme standard face to face | face-to-face dimensions to ASME standard allow drop-in placement into an existing pipeline replacing other standard valves |
| air flanged build listing sample | air-operated flanged builds are listed at DN80 (3 in) PN10 with RF flanged ends, in aluminium-alloy or stainless-steel bodies, including solenoid-integrated executions |
Omvang & bronnotities
| pressure framing | Pressure framing: the referenced general envelope is a sleeve rating (100 psig at 1 in. falling to 15 psig at 12 in., special builds 300 psig), while the tenant page lists flange classes PN10/PN16/150LB - sleeve pressure capacity and flange class are different limits and the mapping is unstated. |
|---|---|
| body concept | Body concept: general references describe the sleeve itself as the valve body (rubber/plastic bodies), while the tenant construction wraps a rubber sleeve in cast iron/carbon steel with cast-iron internals - the tenant build corresponds to the encased style, which references treat as a separate category. |
| duty split | Duty split: reference executions cite excellent throttling characteristics (venturi flow, centerline closure), while the tenant page positions the valve for isolation of abrasive/corrosive media - isolation and modulating duty depend on execution. |
| temperature ceiling | Temperature ceiling: the polymer limit governs operation temperature (about 250 °F general, to 550 °F special), but the tenant page states no temperature band for its rubber-sleeve build - the tenant ceiling depends on the sleeve polymer, which is listed only as generic rubber. |
Bestelling & documentatie
Documenten
Vraag de benodigde documentatieset mee aan bij de aanvraag — gebruikelijke items voor deze uitvoering (materiaalcertificaten, testrapporten volgens de genoemde inspectienorm, maattekeningen) worden in de offerte bevestigd en meegestuurd.
Offerte
Een offerteklare aanvraag noemt: nominale maat en drukklasse, voorkeur voor huis- en zittingsmateriaal, aansluiting, bediening, en het medium met temperatuur. Typische waarden op deze pagina zijn benchmarkreferentiebereiken; de bindende waarden worden in de offerte bevestigd.
Sample & levering
Leveringsvoorwaarden, orderhoeveelheden en levertijd worden per order afgesproken — noem het bestemmingsland en het gewenste schema bij de aanvraag.
Opslag & verzending
Bewaar ventielen met zittingen en afdichtingen beschermd tegen UV, ozon en vervorming, houd de vlakbeschermers op de aansluitvlakken tot installatie, en vermijd bij uitvoeringen met elastomeer- of PTFE-zittingen langdurige buitenopslag — zittingscompounden verouderen het snelst in direct zonlicht en bij vorst.
Veelgestelde vragen
Wat moet een offerteaanvraag voor knijpkleppen bevatten?
De geldende norm en klasse, de nominale maat, de body- en zittingmaterialen, het medium met temperatuur en de bestemming — ontbrekende informatie wordt tijdens de offerte bevestigd.
Welke maat en drukklasse zijn er beschikbaar bij knijpkleppen?
Een geverifieerd maat en drukklasse-bereik voor deze klep is nog niet op deze pagina gepubliceerd — het maat en drukklasse dat voor uw toepassing geldt, wordt voorgesteld en bevestigd tijdens de offerte. Stuur de bedrijfsomstandigheden mee met de aanvraag; de selectie wordt in het aanbod vermeld.
Welke bodymateriaal zijn er beschikbaar bij knijpkleppen?
Een geverifieerd bodymateriaal-bereik voor deze klep is nog niet op deze pagina gepubliceerd — het bodymateriaal dat voor uw toepassing geldt, wordt voorgesteld en bevestigd tijdens de offerte. Stuur de bedrijfsomstandigheden mee met de aanvraag; de selectie wordt in het aanbod vermeld.
Types binnen deze familie
Type
Luchtbediende Knijpkleppen
Luchtbediende knijpkleppen sluiten en moduleren door perslucht in het kleplichaam rond een versterkte elastomeerhuls te voeren, zodat het medium niets anders da
Specificaties bekijken →Type
Mechanische Knijpkleppen
Mechanische knijpkleppen comprimeren de elastomeerhuls met een horizontale balk aangedreven door een afstelmechanisme — handwiel, pneumatische cilinder, hydraul
Specificaties bekijken →Type
Knijp-Regelkleppen
Knijp-regelkleppen zijn de normaal-gesloten knijpklep-variant: perslucht opent de huls tegen een veerretour, en het ventileren van de lucht laat de klep veilig
Specificaties bekijken →Offerte aanvragen voor Knijpkleppen
Dien uw eis hier in — een offerteklare aanvraag noemt de geldende norm en klasse, maat, materialen, medium, temperatuur en bestemming.
Wat er met uw gegevens gebeurt, staat beschreven in onze privacyverklaring.
Offerte voor Knijpkleppen
Stuur norm, drukklasse en maat voor een offerteklare aanvraag — beantwoord met documenten en voorwaarden.