Hisaka Plate Heat Exchanger
Spare Parts Supplier
Hisaka Works of Osaka builds gasketed plate heat exchangers, and on board they serve among other duties as lube oil coolers and as fresh water coolers for the generator engines. Plates and gaskets are what a regasketing job asks for, so every enquiry starts from the model and the manufacturing number on the nameplate.
Hisaka coolers met in the engine room
Each Hisaka plate series has its own plates and gaskets, and replacement gaskets are listed by plate type rather than by maker. The cards below start from the series on the nameplate and then turn to the duty the cooler does on board, because the duty decides the plate material and the gasket compound.
UX-10 · UX-20 · UX-90 · UX-100
UX models run from small plates to large ones under a single series letter, so UX-10 and UX-100 share a name but no plate. Each number is a plate type of its own, and replacement gaskets are offered against that plate type, for example an FKM gasket for the UX20 plate. Inside one frame the gaskets can also differ by position in the pack, so the plate arrangement drawing is worth sending with the order. Plates, gasket sets and tightening bolts are the usual lines.
RX series
RX is a separate Hisaka plate family with its own gasketting manual, and independent gasket makers list RX plates and gaskets under their own references. A UX gasket set will not seat on an RX plate even where the frames look alike, so the series letters on the nameplate decide the catalogue before the number does.
Glued and slit-in plates
Hisaka plates are built either for glued gaskets or as slit-in plates, on which the gasket is pressed into the plate without adhesive. Replacement sets are listed separately for the two fixings, as with the glued and slit-in versions of the UX10 plate, so a glued set is not the answer for a slit-in plate. Say which is fitted, or send a photograph of a removed plate along the gasket groove.
Lube oil cooler · generator fresh water cooler
Hisaka plate heat exchangers serve on board as lube oil coolers and as fresh water coolers for the generator engines, and spare plates and gaskets are offered for both duties. Name the cooler in the enquiry, not only the circuit: each one is a separate frame with its own plate count and its own gasket compound.
Hisaka Works · Heat Exchanger Division
The same company name appears on ball valves and on food and pharmaceutical process equipment from Hisaka's other divisions. This page covers the plate heat exchangers only; a Hisaka valve is quoted from the valve's own marking.
Why a Hisaka cooler is opened
Most Hisaka enquiries begin when a cooler is opened, either on schedule or because something on the round has changed. What was found when the pack came apart narrows the order more than the age of the unit does.
Weeping at the pack edge
A gasket that has taken a permanent set no longer recovers when the frame is tightened, and the first sign is a wet streak down the side of the plate pack. Tightening further only crushes it. Once one gasket has gone this way the rest of the set is usually close behind, which is why most lines are for a full set rather than single gaskets.
Oil where water should be
Oil traces in the cooling water, or water in the lube oil, mean that the two sides are meeting inside the pack, through a cracked plate or across a failed double seal at a port. On a lube oil cooler this is an engine matter before it is a parts matter, and a pressure test on the opened pack shows which plates go on the order.
Pitting and thinning plates
Where seawater passes through a plate cooler, the plates are normally titanium for corrosion resistance. A pitted or cracked plate on that side is replaced plate for plate, in the same material and hung the same way round, so a photograph of the plate's stamping belongs with the request.
Old adhesive and worn bolts
Glued sets need the old adhesive removed and fresh adhesive matched to the gasket compound, while slit-in gaskets have to be eased out of the plate, and one torn on removal is not refitted. Tightening bolts with heavy rust or damaged threads belong on the same order, because uneven tightening opens a leak the new gaskets did not cause.
Hisaka plate heat exchanger parts we can quote
A Hisaka plate pack is built from heat transfer plates and plate gaskets, closed in a frame by tightening bolts. The list follows the same order, from the pack outwards.
- Heat transfer plates by series and size, in stainless steel or titanium
- Complete plate packs for a stated plate count
- Glued plate gasket sets
- Slit-in plate gasket sets, fitted without adhesive
- First-plate and end-plate gaskets where the parts list gives them separately
- Port and nozzle gaskets where the connections are not rubber-lined
- PTFE cushion gaskets where the unit was built with them
- Gasket adhesive matched to the gasket compound
- Tightening bolts, nuts and washers
- Guide bar and carrying hardware
What to send for a Hisaka cooler
Two units with the same model can hold different plate packs, and a gasket set can differ even within one pack. The items below close those gaps before the first line is priced.
- A photograph of the nameplate with the model and the manufacturing number
- The model exactly as stamped, including any letter after the size number
- The plate count, counted in the frame
- Glued or slit-in: a photograph of a removed plate along the gasket groove
- The gasket compound marking on the gasket; the elastomer code reader decodes NBR, EPDM and FKM marks
- Plate material, and whether seawater passes through the unit
- Which cooler it is: lube oil, central, generator fresh water or MGO
- The plate arrangement drawing or the assembly drawing, if it is on board
- The nozzle connections, rubber-lined or metal, and the flange if a flange gasket is wanted; the flange identifier helps with the standard
Supply route review for Hisaka plate heat exchangers
A plate heat exchanger order goes wrong in small ways: the right series with the wrong gasket fixing, or the right set for the wrong plate position. The review settles those points before any route is priced.
Series letters before the size
The series letters decide which plates and gaskets can fit at all, and the size number narrows it within the series. A request is read in that order, and an RX line is never answered from UX references.
Pack position on every line
Where the parts list separates first-plate, channel and end-plate gaskets, the reply keeps them apart with the quantity of each, so a regasketing set arrives complete for the frame it was written for.
Fixing method stated
Glued and slit-in sets are different items, and so is the adhesive. The reply says which fixing each line was quoted for, and where the plate photographs do not show it, the question comes back before the price.
OEM-route and verified alternative
Where class, a warranty or the owner's approval list calls for the maker's own parts, the OEM-route is quoted. Gasket sets for Hisaka plates are also made independently, and a verified alternative can be reviewed beside the OEM line, checked against the plate type and the compound, with the difference in documentation stated.
Duty confirms the material
The cooler's duty is checked against the plate material and the gasket compound asked for. To compare what a cooler is doing now with its data sheet, the heat exchanger duty calculator works from the flows and the inlet and outlet temperatures.
Hisaka plate heat exchangers — questions buyers ask
Is this the same Hisaka that makes ball valves?
Yes. Hisaka Works has a heat exchanger division, a valve division and a process engineering division under one name. This page covers the plate heat exchangers; for a Hisaka valve, send the marking on the valve body and it is handled as a valve enquiry.
The gaskets on our plates have no glue. Is that a different gasket?
Yes. That is a slit-in plate: the gasket is pressed into the plate instead of being glued, and replacement sets are listed separately for the two fixings. Say which type is fitted, or send a photograph of a removed plate along the gasket groove.
Can the plate count be read from the model?
No. The number in a model such as UX-20 names the plate type, and the pack inside was sized for the duty the cooler was bought for. Count the plates in the frame, or send the manufacturing number with the plate arrangement drawing.
Are gaskets for Hisaka plates made by anyone other than Hisaka?
Yes, independent gasket makers list sets for Hisaka plates, for example a glued FKM gasket for the UX20 plate. Such a set can be reviewed as a verified alternative where the buyer's approval list allows it, checked against the plate type, the fixing and the compound.
Does this page cover a plate fresh water generator in the same engine room?
No. A fresh water generator is identified from its own maker and type, with the evaporator and condenser packs counted separately. See the Alfa Laval JWP page for how such a unit is read.
Is Vessel Core connected to Hisaka?
No, and there is no agreement of any kind. Vessel Core holds no distribution, representation or partnership agreement with Hisaka, and quoting a component against one of its designations implies no approval by the maker and no claim of interchangeability.
Start from the Hisaka nameplate, the plate count and the gasket fixing
A request that carries the model, the manufacturing number, the plate count and the gasket fixing can be read against the right plate family from the outset. If only part of that is to hand, send what you have.
