Boom, arm, bucket, swing and track circuits fail in predictable ways. Hydraulic valves, fittings and hose pipes are what we supply, and we will tell you straight where your requirement fits and where it does not.
The highest-flow work circuit on the machine and the most exposed hose run. Two-wire braid on compact machines, four-spiral where working pressure and impulse duty are higher.
EN 853 2SN · EN 856 4SP · ISO 18752A person reads it, not an auto-responder. If it is something we can supply well, we say so and quote it. If it sits outside what we do, or if we cannot hold the specification you need, we tell you that plainly and up front rather than stretching to fit, and where we can we will point you toward a better route. You get a straight answer either way, within one business day.
None of these are random. Each has a mechanism, and each has a standard that tells you how to specify against it.
Hose rubbing on hose, on structure, and on the ground. Once the cover is breached the reinforcement corrodes and burst follows, usually well before the assembly's rated life.
Repeated pressure spikes fatigue a hose even when its burst rating is comfortably adequate. A hose can pass a burst test and still fail on impulse cycles, which is why four-spiral construction exists.
BSP and NPT share the same 1:16 taper but different thread form angles, 55° against 60°. In many common sizes they screw together and look correct, then leak under pressure. BSPP seals on a bonded washer against the port face, not on the threads.
Assemblies built from one maker's hose and another maker's ferrule and fitting compromise coupling retention. Major manufacturers restrict their crimp data to their own combinations and disclaim liability otherwise.
Every hose change in the field is an ingress event. Particles at 4 µm and above attack proportional and servo elements; 6 µm and above accelerates pump and cylinder wear.
This is an orientation map, not a parts list. It shows which of our product families sit where on earthmoving equipment, so you can see quickly whether your requirement is one we can serve, and where it is not.
We work to your specification. Send the size, material, thread standard, pressure rating and quantity, or a drawing or sample, and we confirm everything in writing before production. If we cannot hold what you need, we will say so rather than guess. Ratings and sizes referenced anywhere on this site are typical reference values.
Published so you can check a specification without calling us. Where your requirement names one of these, quote it in your RFQ and we will confirm against it, or tell you if we cannot.
Confirmed specification against your drawing or sample before production, consistent construction across repeat orders, and full export documentation on every shipment. MOQ and price breaks stated up front, not discovered at PO stage.
Matched hose and ferrule pairings so retention is not left to chance, dimensional consistency across batches, and a straight answer on what we do and do not carry in a given size.
A defined spares list per machine type, RFQ response within one business day, and test and inspection documentation where the order calls for it. Third-party inspection welcomed and coordinated.
Supply to approved drawing or sample, traceability through production, QA and pressure or dimensional testing before dispatch, and export documentation handled end to end by one accountable team.
We supply hydraulic valves, fittings and hose pipes. Where your requirement sits inside that, we would love to take it on, and we will tell you exactly what we can hold and what we cannot.
Where it sits outside, you will hear that from us up front, not three weeks into a quote. And if you want, we will point you toward a route that is more likely to work. No pitch attached to that answer, and no hard feelings if you come back later.
Not an auto-responder chain, and not a queue.
Including the answers that are a no.
What we can hold, and what we cannot, in writing.
NDA on request, handled with discretion.
Two-wire braid to EN 853 2SN or SAE 100R2AT covers most compact and mid-size boom circuits. Where working pressure is higher or the duty is impulse-heavy, four-spiral to EN 856 4SP or 4SH is the usual construction. The cleanest way to specify is ISO 18752, which classifies hose by pressure class and by impulse grade rather than by reinforcement type alone.
Three mechanisms account for most of it. External abrasion wears through the cover until the reinforcement corrodes. Repeated pressure spikes fatigue the hose even when its burst rating is adequate. And routing that violates the minimum bend radius cracks the inner tube. SAE J1273 covers routing, clamping and abrasion protection; ISO 6945 is the test standard for cover abrasion resistance.
2SN, to EN 853, carries two braided steel wire layers. 4SP, to EN 856, carries four layers of high-tensile wire laid in parallel spirals. Braid is more flexible with a tighter minimum bend radius; spiral is significantly better at surviving repeated pressure impulses, which is why breaker and heavy work circuits move to spiral.
Both are tapered at the same 1:16 rate, but the thread form angle differs, 55° for BSP and 60° for NPT. In several common sizes they will screw together and appear correct, then weep under pressure because contact is incomplete. BSPP, by contrast, is a parallel thread that seals on a bonded seal against the port face, so without that washer it will not seal at any torque.
No. JIC to SAE J514 and ORB to SAE J1926 share the same UN/UNF thread form but seal completely differently. JIC seals on a 37° metal cone; ORB seals on an O-ring compressed against a machined boss face. Assembling one into the other will not seal reliably and can damage the port.
Both are four-bolt split flanges, and both correspond to ISO 6162, Code 61 to ISO 6162-1 and Code 62 to ISO 6162-2. Code 61 is the standard series; Code 62 is the heavy high-pressure series. The flange heads are interchangeable across SAE J518, DIN 20066, ISO 6162 and JIS B8363 except for bolt sizes, which is where mistakes usually happen.
Common practice, reflected in DIN 20066 and echoed in major manufacturers' operating instructions, is that bulk hose should be no more than four years old at the time of assembly, and a finished assembly should not remain in service more than six years from date of manufacture, of which storage should not exceed two years. On abrasive site work, cover condition usually forces replacement well before that.
Yes, and that is the normal route. Share a drawing, a specification or a sample and we confirm dimensions, material, thread standard and pressure rating in writing before production. Where a requirement is beyond what we can reliably hold, we say so at that point rather than after the order.
Yes, and it is common. Mixed fleets mean BSP, NPT, SAE and DIN/ISO connections all appear in the same workshop. Adapters and reducers across those families are a core part of what we supply, so a single order can cover the range.
Tell us anyway. We supply hydraulic valves, fittings and hose pipes. If your requirement sits inside that we would like to take it on, and we will tell you exactly what we can hold and what we cannot. If it sits outside, you will hear that from us up front rather than three weeks into a quote, and where we can we will point you toward a route more likely to work.
Size, material, thread standard, pressure rating, quantity and destination country, or simply a drawing or sample. If it is something we can supply well we will quote it. If it is not, we will tell you that instead, and point you somewhere more useful where we can.
