For hydraulic and pneumatic lines that connect and disconnect frequently: three families — push-in ISO 7241-A and 7241-B, plus the screw-locking 203 Series TGW to 950 bar for shock and heavy vibration.
State the family (or your old brand), size, thread (BSPP/NPT), medium & temperature — quotes back within 2 working hours.
| Families | ISO 7241-A · ISO 7241-B · 203 Series TGW (screw-locking) |
|---|---|
| Range | 1/4″ – 2″ — all three |
| Materials | SS316 (AISI 316) · carbon steel (EN-10277-3) · brass (DIN-EN 12164) |
| Seals | NBR · Viton (FKM) · EPDM |
| Threads | Female BSPP or NPT · straight-thread versions available |
| Safety factor | 4 — on working pressure, not burst |
The pressure table per size for all three families is on this page, as printed — full dimensions in the catalogues below.
| At a glance | ISO 7241-A | ISO 7241-B | 203 TGW |
|---|---|---|---|
| Connection | Push-in | Push-in | Threaded collar |
| Max (1/4″) | 350 bar | 400 bar | 950 bar |
| Strength | General hydraulics | Steady pressure | Shock & vibration |
| Size | ISO 7241-A | ISO 7241-B | 203 Series TGW |
|---|---|---|---|
| 1/4″ | 350 bar | 400 bar | 950 bar |
| 3/8″ | 300 bar | 380 bar | 750 bar |
| 1/2″ | 300 bar | 350 bar | 750 bar |
| 3/4″ | 250 bar | 320 bar | 650 bar |
| 1″ | 230 bar | 300 bar | 450 bar |
| 1 1/4″ | 230 bar | 280 bar | 450 bar |
| 1 1/2″ | 200 bar | 140 bar | 300 bar |
| 2″ | 130 bar | 100 bar | 300 bar |
Pressure falls as the bore grows — and note: ISO 7241-B does not always exceed A across all sizes (see 1 1/2″ and 2″). All figures carry a safety factor of 4 on working pressure.
Seal temperature ranges
| Seal | Min | Max | For |
|---|---|---|---|
| NBR | −30 °C | +100 °C | Standard hydraulic oil duty |
| Viton (FKM) | −10 °C | +200 °C | High-temperature systems |
| EPDM | −40 °C | +150 °C | Water · coolant · steam — the widest range |
Industrial hydraulics, agricultural machinery, snow plough attachments, truck/trailer connections, mobile applications — metal perch valve alignment.
Industrial hydraulic lines, offshore, steam systems, cleaning equipment, food/chemical processing, water & coolant lines — metal-to-metal valve stop.
Mobile, construction, oil & gas, material handling — the threaded collar holds heavy mechanical loads, shock and vibration to 950 bar.
Identifying a coupling: knurled sleeve = push-in ISO; threaded collar = 203 TGW. Read the stamped markings: maker · standard · bore DN in mm (DN20 = 3/4″) · material. Dust plugs & caps: the cheapest part on the list — and the one that decides coupling life: grit on a face gets driven into the seal at the next connection, and then into the system.
Dimensions and part numbers are in the catalogues, as printed; stock and price are not — send the list and we confirm both.
No. The three families do not intermate — ISO 7241-A, ISO 7241-B and the 203 Series TGW are separate patterns.
A larger bore carries more end load at the same pressure — force equals pressure times area.
NBR for standard hydraulic oil; Viton for high temperature; EPDM for water, coolant and steam. Tell us the medium and the temperature — we pick it rather than defaulting.
On site work, yes — grit that lands on a face gets driven into the seal at the next connection, and then into the system. The cheapest part on the list, and the one that decides how long a coupling lasts.
203 TGW = Gromelle 6000 · Hansen W6000 · Tuthill 6000. ISO 7241-A = Parker 6600 · Snap-Tite 61 · Faster ANV. ISO 7241-B = Faster H · Aeroquip FD45 · Parker 60.
Check the sleeve: knurled = push-in ISO; threaded collar = 203 TGW. Then read the markings: maker, standard, bore DN in mm (DN20 = 3/4″), material.
No — sold separately. A single power pack may need one coupler and multiple nipples for different attachments.
4, across all families and sizes — applied to the quoted working pressures, not burst figures.
Yes — all three families in our regional warehouses in Singapore and Malaysia, out within 24 hours of your PO; quotes within 2 working hours.
Related: JIC fittings · DIN 2353 fittings · test couplings · about the Inteva brand · all high pressure fittings · baca halaman ini dalam Bahasa Indonesia