Marine valves
Globe and angle valves, gate valves, butterfly, ball and check valves, and system-specific valve assemblies, with their seats and discs, spindles, spools, gland packing and valve repair kits.
Valves & Pipe Systems
Marine Valves
Marine Valves
& Pipe System Spare Parts Supplier
Marine valve and pipe-system spare parts supply for engine-room and ship systems.
Pipe-system contextSystem, pressure, material and connection data
Technical cross-checkingMaker, type, size, rating, drawing and photos
OEM + verified alternativesRoute review by compatibility and approval needs
Port-aware deliveryUrgency, port, ETA and handover planning
Valve spare parts supplier
Valve and pipe-system RFQs structured around size, rating and installed service.
Vessel Core supplies marine valves, actuators, fittings, flanges and pipe-system replacement parts across engine-room and ship systems. For a pneumatic actuator, the pneumatic cylinder air calculator works out the free air it takes per cycle and its theoretical force from the piston diameter, the stroke and the pressure.
Where part numbers are missing, the request can begin from system service, valve type, size, pressure rating, material, flange standard, drawing position or photos. That context helps avoid quoting the wrong assembly or gasket set.
A safety or relief valve is a different request from a line valve. It is a certified protective device, its spring is chosen against the set pressure recorded for the position rather than the body size, and the work usually sits inside a set-pressure check or a class survey. The LESER and Fukui pages show what that changes on the enquiry.
Supply scope
Valve and pipe-system parts we can structure into an RFQ.
Coverage for repair yards, vessel maintenance teams and purchasing departments handling planned or time-critical pipe-system work.
Actuators
Pneumatic, hydraulic and electric actuators: repair kits, diaphragms, positioners and replacement units.
Pipe fittings
Fittings, elbows, adapters, couplings and connection-related replacement parts.
Flanges
Flanges by size, rating, standard, material and drawing reference.
Seals
Gland packing, stem seals, O-rings and flange-joint seals for valves and pipework.
Gaskets
Flange gaskets, valve gaskets, gasket sets and service-related sealing items.
Pressure control and safety valves
Reducing valves, pressure regulators, and safety and relief valves with their internals: springs, discs, seats or nozzles, bellows, pilot components and soft-seal kits.
Pipe-system parts
Replacement assemblies and drawing-position items for engine-room piping systems.
Model index
31 models in this category, filterable.
Start typing a designation, a maker or a part and the rows filter as you go. The full list across every category and maker lives on the maker reference page.
31 models · 12 notes
| Model | Series | Maker | Typical parts |
|---|---|---|---|
| TEA · TE series | Thermostatic expansion valves | Danfoss | TEA is the cast-iron, weld-flange ammonia line; TE covers HFC and HCFC refrigerants with an exchangeable orifice sized to the duty rather than the valve body. The two bodies are not interchangeable, so state which line and orifice size is fitted. |
| EVR · EV22x / EV25x / EV31x | Solenoid valves | Danfoss | EVR is Danfoss's general refrigerant solenoid range; EV22x, EV25x and EV31x are marine-specific types in provision plant and AC pipework. The coil is ordered separately by voltage and is a frequent cause of a fault reported against the valve body. |
| QT50 · QT70 | QT series, small | Eltorque | The smallest actuators of the range, for small valves. Control boards, covers and seals are quoted against the QT size and the options on the label. |
| QT250 · QT400 | QT series | Eltorque | The middle sizes of the range. Failsafe and Dual CAN are options shown on the label, so the option line from the label goes into the enquiry together with the valve the actuator turns. |
| QT800 · QT1000 | QT series, large | Eltorque | The larger quarter-turn actuators for bigger ballast and cargo valves. Ex and open deck versions exist for most sizes, and the version is named on every line. |
| PSL-MD low-pressure type | Liquefied-gas cargo tanks | Fukui | The PSL-MD is Fukui's low-pressure pilot-operated type for liquefied-gas cargo tanks. Cargo tank protection sits in a narrow band: the valve has to hold tight against normal tank pressure and still relieve without hesitation, so the condition of the pilot, the seat and the soft seals matters more here than raw size does. |
| NRG 16-50 · NRS 1-50 | Water level limiters | GESTRA | The NRG 16-50 level electrode works with the NRS 1-50 level switch as a water level limiter for steam boilers, including on seagoing vessels. Electrodes, electrode tips, switch units and their gaskets are quoted as a matched pair, against the codes on both. |
| UNA 45 · UNA 46 | Ball float traps | GESTRA | Ball float steam traps that remove condensate from steam and compressed air lines; versions carry a connection for a monitoring sensor. Regulators, float and valve assemblies, covers and gaskets are quoted against the full type and body marking. |
| BK 45 · BK 46 | Bimetallic traps | GESTRA | Thermovit bimetallic traps for condensate removal from heating processes where the load changes little. Regulator inserts and gaskets are matched to the type on the body. |
| RK 86 · RK 86A · RK 16A · RK 41 | Non-return valves | GESTRA | Disco non-return valves, most of them wafer designs fitted between flanges, with springs offered for different closing pressures. A valve without a spring is installed only in a vertical line with upward flow, so the fitting position belongs in the enquiry along with discs, springs and seats. |
| KLINGERSIL C-4400 | KLINGERSIL · aramid fibre with NBR | Klinger | The general-purpose KLINGERSIL grade: aramid fibres bound with NBR rubber, used on oil, fuel, water, steam and gas joints, and bought as sheet or as cut joints. A request names C-4400 because that is the grade on the drawing or printed on the old sheet, and another grade is not put in its place without saying so. |
| KLINGERSIL C-4430 | KLINGERSIL · synthetic and glass fibre with NBR | Klinger | A KLINGERSIL grade of synthetic and glass fibres bound with NBR, which KLINGER offers for hot water and steam as well as oils and fuels; bought as sheet or as cut flange joints. Its number is close to C-4400 and the two are easy to mix up on a requisition, so the line copies the grade exactly as printed, including any word after the number. |
| Compact Performance series | Spring-loaded & Compact Performance series | LESER | The compact line, quoted against the type designation and the orifice designation carried on the valve itself rather than against the series name. Where a valve of this line is on a machinery-space position, the orifice designation is the field that keeps a disc or seat component on the right size. |
| High Performance series | Spring-loaded & High Performance series | LESER | Scoped from the type designation, the orifice designation and the set pressure recorded for the position the valve protects. On this line the same body size is built in more than one internal arrangement, so the type designation has to be sent in full — every character of it, as stamped. |
| Modulate Action series | Modulate Action series | LESER | The modulating line. As with the spring-loaded series, it is the type designation and the orifice designation on the valve that decide the internals, not the series name, and the medium the valve sees decides the soft-seal specification. |
| Series 810 and 820 — pilot-operated relief valves | Pilot-operated & series 810 and 820 | LESER | Pilot-operated relief valves carry pilot components in addition to the main valve internals, so they are scoped differently from a spring-loaded valve: the pilot is a request line of its own. LESER holds a DNV GL Type Approval Certificate for the series 810 and 820 pilot-operated relief valves; that certificate applies to those series and is not read across to the other lines. |
| Types 526 and 441 — horizontal and suspended installation | Marine installation & types 526 and 441 | LESER | Types 526 and 441 are documented for horizontal and suspended marine installation. Where one of these is fitted, state the installation arrangement alongside the type designation, since mounting-related components and the way the valve is supported belong in the same enquiry as the internals. |
| NS-C double-eccentric butterfly valves | Butterfly valves — NS-C series | Nakakita | The NS-C series is Nakakita's double-eccentric butterfly valve line, with more than 100,000 units delivered according to the manufacturer. Double-eccentric geometry lifts the disc clear of the seat as it opens, which is why the seat face, rather than the disc, is usually the first component discussed when one of these valves is opened up. |
| STK | Centralized hydraulic VRC — rotary | Pleiger | Rack-and-pinion hydraulic actuators for butterfly and ball valves, double- or single-acting, designed for dry, submerged or hazardous-area positions; in an emergency every one can be worked by hand pump. Single-acting units add a spring assembly, and Pleiger lists that spring-return version of the STK as STKG. Seal kits, indication items and the coupling to the valve are the lines a request usually covers. |
| PVK | Centralized hydraulic VRC — linear | Pleiger | Hydraulic linear actuators for globe valves, double-acting or single-acting with fail-safe spring return, with a hydraulic override available. Seal kits, override items and the spring set on single-acting units are the recurring lines. |
| EHS-D3 | Electro-hydraulic VRC (EHS) — rotary | Pleiger | An EHS power pack on a double-acting STK actuator in one closed unit, for open/close and continuous duty, with electric limit switches, an optical position indicator and hand-pump emergency actuation. Limit switches, the indicator and terminal box items are looked at before the power pack. |
| EHS-SG · EHS-S/G | Electro-hydraulic VRC (EHS) — spring return | Pleiger | Single-acting electro-hydraulic actuators with spring return: EHS-SG in rotary form, EHS-S/G in linear form. State which of the two is fitted, because the rotary and linear units take different seal and spring items. |
| EHS-Q | Electro-hydraulic VRC (EHS) — separate power pack | Pleiger | A power pack unit installed apart from its linear or rotary actuator, for valve positions that are dry, submerged or in a hazardous area. The request names both halves, the power pack and the actuator it drives, with a photograph of each plate. |
| EHS-EX · EHS-UM | Electro-hydraulic VRC (EHS) — special duty | Pleiger | EHS-EX covers explosion-proof double- and single-acting rotary and linear actuators, and the maker presents an arctic EHS-EX power unit for hazardous areas under its LNG heading; EHS-UM is a double-acting rotary actuator for permanent submersion. The Ex marking or the submerged execution is part of the identification. |
| RK 16/8 · CCM · CM4 · BI | Valve cabinets and control modules | Pleiger | Pleiger Control Modules for solenoid valve cabinets and consoles: BI bus interface, RK 16/8 relay module for centralized actuators, CCM Conti Control Module for continuous position, CM4 for EHS units, IO 8/8/4 and IO/TII input-output modules, and CM-ExE for explosion-proof EHS. Each module is identified by its type designation and the cabinet it sits in. |
| PCL · PPC | Control systems | Pleiger | Pleiger Control Loop (PCL) carries power and data to EHS actuators, pumps and tank sensors on one cable loop; Pleiger Process Control (PPC) is the PC-based control system for valve and pump automation, tank measuring, bilge automation, ballast water exchange and heeling automation. Requests name the node or station, not only the system. |
| FT14 | Ball float traps | Spirax Sarco | A float and thermostatic trap with an integral automatic air vent, for coils and heat exchangers where the condensate load varies. Float and valve assemblies, air vent elements and cover gaskets are quoted against the trap type and the body marking. |
| TD52 · TD52M · TD52L | Thermodynamic traps | Spirax Sarco | Thermodynamic traps for small loads such as steam main drainage, including a low-capacity TD52L and the TD52M. Discs, caps and strainer screens are matched to the exact variant on the body, which is part of every order line. |
| BPT13 · BPT13A · BPT13S | Thermostatic traps | Spirax Sarco | Balanced pressure thermostatic traps, standard as the BPT13A with angled connections, with a version offered for shipboard steam lines. Capsules, valve seats and gaskets are quoted against the full type and the body marking. |
| 700G | Rubber-seated · wafer body | Tomoe | Tomoe's rubber-seated butterfly valve for general service, built as a wafer body clamped between two pipe flanges. Supply records show it with an NBR seat and a stainless steel disc, worked by hand or by an actuator. Seat rings, discs, stems with their seals and the operator are the recurring lines, each read against the full 700G code on the valve. |
| 705G | Rubber-seated · semi-lug body | Tomoe | The semi-lugged version of the 700G. Ship-supply catalogue entries carry it with a worm gear, a lock lever or a centre handle, and with an NBR seat. A 705G is not ordered from a 700G list of the same size: seat ring, disc and operator parts are taken from its own code and plate. |
Service and identification notes
Wear patterns, duty context and plate-reading advice from the maker pages. They help scope a request; they are not designations.
| Topic | Context | Maker | Detail |
|---|---|---|---|
| Approvals across five societies | Class type approval | Fukui | Fukui valves are documented as type-approved by LR, BV, DNV GL, ABS and ClassNK. Which society issued the certificate for the valve in front of you is worth stating in the enquiry, because the survey the overhaul is attached to, and the record the ship has to keep afterwards, follow that certificate rather than the valve body alone. |
| ClassNK hydrogen work | Liquefied-hydrogen carriers | Fukui | Fukui signed a memorandum of understanding with ClassNK in 2023 covering safety valves for hydrogen dual-fuel engines and liquefied-hydrogen carriers, and type approval under that work was issued in 2025. For a buyer the practical point is that hydrogen-side valves carry a documentation trail to reference when the valve is opened. |
| Engine-room pressure relief | Engine-room service | Fukui | Engine-room relief duty is the second documented application. These valves sit on machinery-space systems rather than on cargo, and they are usually opened as part of a planned overhaul rather than after an incident, which is why requests for them tend to arrive as kits and inspection spares rather than as single emergency items. |
| Pilot-operated safety and relief valves | Pilot-operated principle | Fukui | In a pilot-operated valve the setting is held by a small pilot rather than by a large spring bearing directly on the main disc. The pilot senses system pressure and controls the loading on the main valve, which is what allows the valve to stay tight close to its setting and then open decisively. It also means the pilot, not the main body, is the part most often on an enquiry. |
| Ultra-high-pressure relief valves | Hydrogen dual-fuel | Fukui | Fukui also develops ultra-high-pressure relief valves for hydrogen dual-fuel engines. This is newer equipment on a small number of vessels, and enquiries around it are best handled with the valve identity and the system it serves stated in full, since the installed base is not yet something a buyer can assume anything about. |
| Reflex and transparent level gauges | Level gauges · reflex, transparent, bi-colour | Klinger | KLINGER level gauges show the liquid level in boilers and vessels through flat glass. A reflex gauge has one grooved glass, with the liquid dark and the steam space bright; a transparent gauge holds the medium between two plain glasses; a bi-colour gauge shows steam and water in two colours. The gauge type decides the spare: the glass, its gaskets and, on a transparent gauge, the mica shields. |
| Steam, water, fuel, lubrication and cargo duty | Systems protected on board | LESER | The same valve series turns up on steam, water, fuel and lubrication systems, and on LNG/LPG cargo systems including FPSO installations. The system a valve protects, and the medium and temperature it actually sees, decide the soft-seal and bellows specification — which is why the duty is asked for before any seal item is put on a line. |
| Control valves, cylinder valves, regulating valves and safety valves | Control and line valves | Nakakita | Alongside the butterfly line, Nakakita builds control valves, cylinder valves, regulating valves and safety valves. Documented service for the control valves and their controllers includes main-engine fuel-oil heating, cooling fresh-water and lube-oil systems, where the valve and the controller are two halves of one loop and are best identified together. |
| Metal-seated valves with Stellite seat facing | NS-C — metal-seated execution | Nakakita | The metal-seated execution uses a Stellite seat facing. Where a valve has been opened and the seat face is marked, the disc is normally inspected in the same breath, because the two components decide together whether the valve will hold once it is closed up again. |
| PTFE-seated valves | NS-C — PTFE-seated execution | Nakakita | The PTFE-seated execution is the third seat variant offered on the NS-C series. It is the execution most often mis-stated in an enquiry, since a PTFE seat and a rubber seat are not always easy to tell apart in a photograph taken with the valve closed; a photograph of the seat face with the disc part-open removes the doubt. |
| Resilient-seated valves | NS-C — rubber-seated execution | Nakakita | The rubber-seated execution of the NS-C series takes its own seats and seat rings. Two valves of the same nominal size will not share seat parts across executions, so it is worth stating the seat variant in the first message rather than discovering it after a quotation has been prepared against the wrong build. |
| Valve remote-control systems | Remote control — cargo, ballast, bilge | Nakakita | Nakakita also supplies valve remote-control systems for cargo and ballast lines and for bilge piping. On these installations the fault reported from the console and the fault present at the valve are not always the same one, so the actuator, the control medium and the valve itself are described as a set when the request is prepared. |
Nothing matches. Send the designation from the nameplate — we also quote items that are not listed here.
This list indicates coverage. It is not stock on hand and not a claim of affiliation with any manufacturer.
In the field
What a valve manifold looks like where the pipework actually runs.
The first photograph is licensed and representative only, not a Vessel Core installed reference or completed job — photo: LEE 003, Wikimedia Commons, CC BY 4.0. The second and third are Vessel Core's own, taken aboard a vessel during a yard visit in September 2026 and published with the owner's permission. No manufacturer is named for any of the three: the line tags identify duty and pressure rather than a maker, and the cast marks on the valve bodies are not resolvable at published resolution. None of this is a claim that Vessel Core supplied or worked on the equipment shown.
What to send
Send enough context to match the valve, rating and system.
Photos, drawings, flange details and installed-service information can be as important as the part number when valve or pipe-system components are being cross-checked. The engraved line tag often states the duty and working pressure where the valve body does not, so photograph it with the valve. The valve body marking reader explains the size, pressure class and material cast on the body and writes them as an RFQ line, and the gland packing calculator works out the stem packing from the stem, bore and depth. For a control or solenoid valve rated by Kv or Cv, the valve Kv and Cv calculator converts the two and finds the flow or the pressure drop of a liquid duty. On a solenoid valve, the solenoid valve coil reader reads the voltage, duty and plug form from the coil label. At the quay, the international shore connection and the MARPOL discharge flanges have standard sizes, set out on the shore connection flanges page. For a ball or butterfly valve with an actuator, the actuator flange identifier names the ISO 5211 mounting flange from the pitch circle and the bolt thread. The bolt and nut marking reader reads the grade on the flange studs and nuts, such as B7 and 2H. If the owner or class asks for a material certificate or type approval for the item, say so in the request: a type approval certificate covers named series or types and is not read across to the rest of a maker's range. The RFQ evidence checklist and the supply route advisor help prepare the request line by line. For a screwed valve or fitting, the thread identifier narrows the end thread down from a caliper reading and a thread count; for a flanged one, the flange identifier reads the drilling from the outside diameter, the bolt circle and the holes, and the pipe size identifier the pipe it sits on. When a flanged valve is replaced by another make, the valve face-to-face finder shows from the measured gap between the pipe flanges which EN 558 series fits. For the pipe itself, the pipe wall and pressure calculator checks a wall thickness against a pressure by the Barlow formula, and the pipe heat loss calculator gives the heat lost from a steam, thermal oil or hot water line. The tools for valves and piping are also gathered on one view of the measurement tools page.
Vessel and timing
- Vessel name / IMO
- Company name
- Urgency level
- Port / ETA
Equipment reference
- Maker
- Model
- Serial number
- Equipment application
Part request
- Part number
- Description
- Quantity
- OEM / alternative / both
Attachments
- Photos
- Nameplate
- Drawing
- Excel list
Related categories
Connect this RFQ to the wider engine-room supply scope.
Valves RFQ FAQ
Short answers for technical buyers.
Can you quote valves without a part number?
Yes. Send the valve type, system, size, pressure rating, material, connection/flange data, tag, drawing or photos so the RFQ can be structured.
Can you handle time-critical pipe-system repairs?
Yes. Include vessel / IMO, port, ETA, system criticality and whether the item is needed for repair-yard work or onboard replacement.
Can Vessel Core review verified alternatives?
Yes, where technical compatibility and approval context allow. Size, pressure rating, material and connection standards must be checked carefully.
Send valve RFQ
Need valves or pipe-system replacement parts?
Send valve type, size, rating, material, system, quantity and port/ETA. Photos, tags, drawings, flange data or Excel lists are welcome.
