Product family
One-way flow-control components for defined liquid-loop conditions.
Component selection
10 local draft records. Includes unfinished records and Family overviews. Draft · Noindex. Reference configurations are not approved stock. Image public-use review remains separate.
Show content-ready draftsLCP-000084
A higher-flow LC-series press-in non-return cartridge, distinct from a standard 558 version. The catalog lists 5.46 mm part diameter, metal-to-metal seat and…
LCP-000082
A plastic-housing press-in non-return cartridge with an elastomeric seat and listed 5.94 mm part diameter. It is a different installation object from…
LCP-000083
A compact plastic-housing press-in check cartridge with metal-to-metal seat, 6.60 mm listed diameter and 75-Lohm catalog flow-resistance reference.
LCP-000081
A compact non-return cartridge for a metal housing. The maker's 8 mm Zero Leak family lists a 7.95 mm body diameter and…
LCP-000085
A threadless metal-housing check cartridge with a side-exit flow path. The maker lists 7.95 mm part diameter and a configuration-dependent resistance as…
LCP-000031
An individually pictured elongated CA-series check valve for applications requiring a selected adjustable opening setting, subject to spring choice and an explicit…
LCP-000029
A separately pictured compact CO-series one-piece check valve with threaded ends, documented fixed cracking-pressure choices and configuration-dependent pressure-temperature limits.
LCP-000030
A single pictured CH-series tube-fitting check valve whose documented floating-seal construction and selected spring opening behavior distinguish it from the compact CO…
Component overview
A candidate family page for one-way flow requirements under stated operating conditions.
LCP-000032
A clearly pictured CL-series stainless union-bonnet check valve with a top-access bonnet and specific horizontal-orientation requirement, distinct from straight compact check valves.
Specify with confidence
Flow direction, installation position and connections Opening/cracking requirement and reverse-flow conditions Coolant, wetted materials, pressure and temperature Permitted leakage and test conditions Quantity and documentation requirements
Check valves address reverse-flow control at a specific location in the loop. Opening behavior, installation direction and reverse leakage depend on the chosen design and test conditions.
Provide normal and reverse-flow conditions, connection size, orientation, coolant and materials. Identify any cracking-pressure requirement and the acceptance method rather than assuming one family-wide value.
Include the drawing or specification revision and identify any requirements that are still to be confirmed. Available configurations, testing and documentation are confirmed with quotation.
Local editorial preview
Manufacturer examples retain their model and conditions. These references describe source products, not approved stock or supply. Images are pending final selection and rights review.
| Parameter | Documented value / configuration |
|---|---|
| Function | Backflow prevention |
| Interface | DIN/ISO welded; clamp |
| Bore | DN15 to DN100 |
| Test conditions | media: water with up to 50% ethylene glycol; nominal pressure: PN10; temperature: -10°C to 100°C; test standard: GB/T 13927 |
| Parameter | Documented value / configuration |
|---|---|
| Seal | EPDM |
| Actuation | Passive non-return valve |
| Cracking pressure | 1 2 in OD bar: 0.03; up to 3 8 in OD bar: 0.02 |
| Flow direction | One direction; prevents return flow |
| Parameter | Documented value / configuration |
|---|---|
| Nominal cracking options | 0.02, 0.06, 0.21, 0.68, 1.7 barConditions: Attributed manufacturer series/configuration example only; not site stock or capability; scope: CV only. Actual cracking and reseal figures refer specifically to the 0.21 bar nominal row; resealing is a back-pressure criterion, not forward working pressure. Do not substitute CH/CO rows. |
| Cracking adjustment | Fixed factory selection, not field-adjustableConditions: Attributed manufacturer series/configuration example only; not site stock or capability; scope: CV only. Actual cracking and reseal figures refer specifically to the 0.21 bar nominal row; resealing is a back-pressure criterion, not forward working pressure. Do not substitute CH/CO rows. |
| Example nominal cracking | 0.21 barConditions: Attributed manufacturer series/configuration example only; not site stock or capability; scope: CV only. Actual cracking and reseal figures refer specifically to the 0.21 bar nominal row; resealing is a back-pressure criterion, not forward working pressure. Do not substitute CH/CO rows. |
| Example actual cracking band | 0.06 to 0.34 barConditions: Attributed manufacturer series/configuration example only; not site stock or capability; scope: CV only. Actual cracking and reseal figures refer specifically to the 0.21 bar nominal row; resealing is a back-pressure criterion, not forward working pressure. Do not substitute CH/CO rows. |
| Example reseal back pressure | At or below 0.42 barConditions: Attributed manufacturer series/configuration example only; not site stock or capability; scope: CV only. Actual cracking and reseal figures refer specifically to the 0.21 bar nominal row; resealing is a back-pressure criterion, not forward working pressure. Do not substitute CH/CO rows. |
| Parameter | Documented value / configuration |
|---|---|
| Documented construction | Compact one-piece check-valve body with fixed, non-adjustable cracking-pressure selectionConditions: scope: Series description; pictured brass threaded example does not define every material or spring |
| Listed nominal cracking choices | 0.02 to 1.7 barConditions: scope: Selectable nominal spring settings, not an adjustable in-service range or exact cracking tolerance |
| Manufacturer max working pressure | up to 207 barConditions: scope: Manufacturer series maximum; material-temperature curve and selected ends control |
| Listed temperature span | -23 to 190 degCConditions: scope: Not rated at the listed maximum pressure throughout this interval |
| Listed end connection options | 1/4 and 1/2 in NPT female or male threaded examples; 1/4 in tapered-thread examples are also shownConditions: scope: Series ordering choices; both ends, thread form and size must be fixed by the selected order code |
| Listed body and seal options | 316 or 316L stainless-steel or brass body choices; FKM, NBR, EPDM and FFKM seal codes are listedConditions: scope: Ordering choices, not proof that every body, seal and end combination is supplied or coolant-compatible |
| Parameter | Documented value / configuration |
|---|---|
| Documented construction | Floating seal design intended to reduce contamination effects on sealing; fixed cracking-pressure choiceConditions: scope: Manufacturer series; floating seal is not proof of compatibility with any coolant particles or additive |
| Listed nominal cracking choices | 0.02 to 1.7 barConditions: scope: Nominal selection choices; actual and reseal values vary by chosen spring |
| Manufacturer max working pressure | up to 414 barConditions: scope: Manufacturer series maximum; not a site rating or installed duty |
| Listed temperature span | -12 to 204 degCConditions: scope: Check exact pressure-temperature and seal-material limits before selection |
| Listed tube and thread end options | CHSS-FL4 1/4 in and CHSS-ML6 6 mm FITOK tube-fitting examples; NPT-threaded variants are separately listedConditions: scope: Examples only; pressure rating may be limited by selected end connection |
| Listed body and seal construction | 316 stainless-steel body with FKM bonded poppet and O-ring in the catalogued constructionConditions: scope: Catalogued material construction; verify exact order code and coolant compatibility |
| Parameter | Documented value / configuration |
|---|---|
| Documented function | Adjustable cracking-pressure check valve with spring selectionConditions: scope: Adjustment differs from fixed-cracking CV, CH and CO constructions |
| Listed adjustment envelope | 0.2 to 41.4 barConditions: scope: Manufacturer series envelope across springs, not each individual configuration's continuous adjustment range |
| Manufacturer max working pressure | up to 207 barConditions: scope: Series maximum subject to selected body, seal and temperature |
| Listed temperature span | -23 to 190 degCConditions: scope: Do not combine with the series maximum pressure without curve and configuration review |
| Listed tube end options | CASS-FL4 1/4 in and CASS-ML6, CASS-ML8, CASS-ML10 6/8/10 mm FITOK tube-fitting examples; a 1/4 in FR male end is also listedConditions: scope: Series examples; inlet and outlet end codes are selected separately |
| Listed body material | 316 stainless-steel CASS body code is shown in the CA Series ordering exampleConditions: scope: A documented stainless-steel option; no unverified universal seal or coolant statement |
| Parameter | Documented value / configuration |
|---|---|
| Documented construction | All-stainless check valve with union bonnet; bonnet nut above body for specified horizontal installationConditions: scope: Manufacturer stated orientation; not interchangeable with freely oriented inline series |
| Manufacturer max working pressure | up to 414 barConditions: scope: Manufacturer series maximum, not combined with the full listed temperature span |
| Listed temperature span | -53 to 482 degCConditions: scope: Subject to pressure-temperature curve, exact seal and configuration |
| Documented tube end examples | CLSS-FL4, CLSS-FL6 and CLSS-FL8 use corresponding FITOK tube-fitting ends in the dimension tableConditions: scope: Examples with separate dimensions; pictured valve is not assigned a verified order code |
| Reverse to forward flow coefficient | Less than 0.1% of forward-flow coefficient, as stated for CL seriesConditions: scope: Manufacturer series statement, not a selected-valve leakage certificate or nominal cracking pressure; CL requires horizontal bonnet-up installation |
| Opening pressure basis not catalogued | Unlike the adjacent CV, CA, CH, CO and COA opening-pressure entries, the FITOK CL series feature/ordering section does not give a nominal cracking or set-pressure option. It explicitly requires horizontal installation with the bonnet nut on top. Specify required opening/reseal behavior for the selected line and confirm with the supplier; do not transfer another series' spring rating.Conditions: scope: Documented absence in this catalogue; not a measured CL cracking pressure |
| Parameter | Documented value / configuration |
|---|---|
| Mounting configuration | Threadless cartridge insert for a metal housing; elastomeric valve seat |
| Part diameter | 7.95 mm |
| Listed flow resistance | 250 LohmsConditions: scope: maker's listed resistance, not a whole-loop pressure drop |
| Listed component materials | 303 stainless body, 416 stainless cage and pin, 302 stainless spring, 440C stainless ball; EPDM or FKM seal options |
| Example part cracking pressure | CZRM8001004S: reverse-flow, FKM seal, 4 ± 3 kPa cracking pressure measured by the manufacturer's air-flow definitionConditions: scope: One listed part example; not a universal series setting or liquid-coolant qualification |
| Parameter | Documented value / configuration |
|---|---|
| Mounting configuration | Press-in cartridge for a plastic housing; elastomeric valve seat |
| Part diameter | 5.94 mm |
| Listed flow resistance | 250 Lohms |
| Listed component materials | 303 stainless body, 416 stainless cage, 302 stainless spring and 440C stainless ball; EPDM or FKM seal options |
| Example part cracking pressure | CZPM6001004S: FKM seal and 4 ± 3 kPa nominal cracking-pressure exampleConditions: scope: One listed part example; application to water/glycol needs separate qualification |
| Parameter | Documented value / configuration |
|---|---|
| Mounting configuration | Press-in cartridge for a plastic housing; metal-to-metal valve seat |
| Part diameter | 6.60 mm |
| Listed flow resistance | 75 Lohms |
| Listed component materials | 303 stainless body, 305 stainless cage, 302 stainless spring and 440C stainless ball; metal-to-metal seat |
| Example part cracking pressure | CCPI6510004S: 4 ± 3 kPa cracking-pressure example; no fixed series-wide settingConditions: scope: One listed part example; maximum pressure depends on housing and installation |
| Parameter | Documented value / configuration |
|---|---|
| Mounting configuration | Press-in cartridge for a plastic housing; metal-to-metal valve seat |
| Part diameter | 5.46 mm |
| Listed flow resistance | 140 Lohms; manufacturer describes higher flow capacity than its standard 558 Series |
| Listed component materials | 303 stainless body, 305 stainless cage, 302 stainless spring and 440C stainless ball; metal-to-metal seat |
| Example part cracking pressure | CLCP5510004S: 4 ± 3 kPa cracking-pressure example in the plastic-housing press-in seriesConditions: scope: One listed part example; not the separate metal-housing insert series |
| Parameter | Documented value / configuration |
|---|---|
| Mounting configuration | Threadless insert for a metal housing; side-exit flow path and metal-to-metal seat |
| Part diameter | 7.95 mm |
| Listed flow resistance | As low as 55 Lohms; configuration dependentConditions: scope: lower listed bound, not guaranteed for every configuration |
| Listed component materials | 303 stainless upper and lower bodies, 416 stainless pin, 302 stainless spring and 440C stainless ball |
| Example part cracking pressure | CCFM8321014S: forward side-exit flow path, 14 ± 5 kPa cracking-pressure exampleConditions: scope: One forward-flow part example; reverse-flow order codes use a different installation drawing |
Selection resources
Selection guide
Define interface, service method, fluid conditions, materials, validation, and quantity before comparing coupling options.
Read guideSelection guide
Separate the service architecture from the exact connector interface before preparing an RFQ.
Read guide
Selection guide
A practical checklist for routed liquid-cooling assemblies.
Read guide