Three sizes, one eight-position string
A T6 single pump is a fixed-displacement vane pump built from one cartridge: a rotor and vanes running inside a cam ring, between two side plates. The industrial line comes in three sizes — T6C, T6D and T6E — and each size carries its own set of cam rings, so the same eight positions describe a 10.8 cm³/r pump and a 268.7 cm³/r pump without the layout changing at all.
This is the shortest string in the family. The mobile builds keep eight positions and change the design letter; the through-drive builds run to eleven, because the rear adapter and the coupling are named separately. A string written for one build does not order another, which is why the series position is the first one to settle.
The eight positions at a glance
| # | What it sets | Values on the industrial single pump |
|---|---|---|
| 1 | Series and frame | T6C (SAE B two-bolt flange); T6D and T6E (SAE C two-bolt) |
| 2 | Cam ring, and with it the displacement | T6C B03–B31 · T6D B14–B50 · T6E 042–085 |
| 3 | Shaft | 1 keyed · 2 keyed, non-SAE · 3 splined · 4 splined, second standard |
| 4 | Rotation | R clockwise · L counter-clockwise, seen from the shaft end |
| 5 | Porting combination | 00 standard · 01 · 02 · 03 |
| 6 | Design letter | B on T6C and T6D · A on T6E |
| 7 | Seal class | 1 mineral oil · 4 fire-resistant fluids · 5 both |
| 8 | Modification | A position of its own; the ordering examples leave it blank |
Two of these positions look like the same kind of value and are not: position 2 sets the pumping cartridge, position 6 the design letter of the pump that carries it. Reading one as the other is what turns a correct code into a wrong pump.
Position 1: the series letter sets the frame
The first position names the size, and the size fixes the mounting flange, the port diameters and the weight. T6C mounts on an SAE B two-bolt flange: 146.0 mm between the holes, 14.3 mm hole diameter, 174.5 mm across the flange, bolts torqued to 159 N·m. T6D and T6E share the SAE C two-bolt flange instead: 181.0 mm between the holes, 212.4 mm and 213.0 mm across respectively, bolts torqued to 187 N·m.
That single letter therefore decides more of the installation than any other position. A pump ordered one size out arrives with the right displacement and will not bolt on.
Position 2: the cam ring
This position carries the cam ring, and the cam ring is what fixes the displacement — from 10.8 cm³/r on the smallest T6C ring to 268.7 cm³/r on the largest T6E ring.
Most catalogues write the ring with a B prefix (B03), some with three plain digits (003), and the E size rings carry no prefix at all (042). The digits are the ring number, so either form points at the same ring: copy the code as it stands on your nameplate or parts list.
One thing to check when a code is quoted without its unit: some catalogues print the volumetric displacement beside it, others the delivery at 0 bar and 1500 r/min, and those two figures are a factor of 1.5 apart. The unit, or the column heading of the catalogue it came from, settles which one you have.
| Series | Ring code, with the prefix | Ring code, plain digits | Volumetric displacement |
|---|---|---|---|
| T6C | B03 |
003 |
10.8 cm³/r |
| T6C | B05 |
005 |
17.2 cm³/r |
| T6C | B06 |
006 |
21.3 cm³/r |
| T6C | B08 |
008 |
26.4 cm³/r |
| T6C | B10 |
010 |
34.1 cm³/r |
| T6C | B12 |
012 |
37.1 cm³/r |
| T6C | B14 |
014 |
46.0 cm³/r |
| T6C | B17 |
017 |
58.3 cm³/r |
| T6C | B20 |
020 |
63.8 cm³/r |
| T6C | B22 |
022 |
70.3 cm³/r |
| T6C | B25 |
025 |
79.3 cm³/r |
| T6C | B28 |
028 |
88.8 cm³/r |
| T6C | B31 |
031 |
100.0 cm³/r |
| T6D | B14 |
014 |
47.6 cm³/r |
| T6D | B17 |
017 |
58.2 cm³/r |
| T6D | B20 |
020 |
66.0 cm³/r |
| T6D | B24 |
024 |
79.5 cm³/r |
| T6D | B28 |
028 |
89.7 cm³/r |
| T6D | B31 |
031 |
98.3 cm³/r |
| T6D | B35 |
035 |
111.0 cm³/r |
| T6D | B38 |
038 |
120.3 cm³/r |
| T6D | B42 |
042 |
136.0 cm³/r |
| T6D | B45 |
045 |
145.7 cm³/r |
| T6D | B50 |
050 |
158.0 cm³/r |
| T6E | — | 042 |
132.3 cm³/r |
| T6E | — | 045 |
142.4 cm³/r |
| T6E | — | 050 |
158.5 cm³/r |
| T6E | — | 052 |
164.8 cm³/r |
| T6E | — | 054 |
171.0 cm³/r |
| T6E | — | 057 |
183.3 cm³/r |
| T6E | — | 062 |
196.7 cm³/r |
| T6E | — | 066 |
213.3 cm³/r |
| T6E | — | 072 |
227.1 cm³/r |
| T6E | — | 085 |
268.7 cm³/r |
Two details in that table are worth keeping: the same digits can appear in two sizes with different displacements — B14 / 014 is 46.0 cm³/r on T6C and 47.6 cm³/r on T6D — and the E size rings are designated in three digits throughout, because that size carries no letter.
Position 3: the shaft code
The shaft position is read across the sizes, never down the list:
| Code | T6C | T6D | T6E |
|---|---|---|---|
1 |
Keyed, SAE B, Ø22.2 mm | Keyed, SAE C | Keyed, SAE CC |
2 |
Keyed, non-SAE | Keyed, non-SAE | Keyed, non-SAE |
3 |
Splined, SAE B, 13 teeth | Splined, SAE C, 14 teeth | Splined, SAE C, 14 teeth |
4 |
Splined, SAE BB, 15 teeth | Splined, non-SAE | Splined, SAE CC |
The shaft also carries two limits that have nothing to do with displacement. The permissible axial load, for a direct-coupled drive, is 800 N on T6C, 1200 N on T6D and 2000 N on T6E. The torque limit is printed as a product: Vi × p, in cm³/r × bar. On T6C it is 16340 for shaft 1, 14300 for shaft 2, 20600 for shaft 3 and 21800 for shaft 4; on T6D and T6E the shaft 2 figure is 34590. Read that number against the shaft code rather than the displacement: a large pump on a light shaft can be the weaker combination.
Position 4: rotation, seen from the shaft end
R is clockwise and L counter-clockwise, both judged from the shaft end. The porting diagrams are drawn in the same view, so the rotation and the porting combination are best read together off the machine drawing.
Position 5: the four porting combinations
| Code | Outlet | Inlet |
|---|---|---|
00 |
Upper side | Lower side, 180° opposite — the standard arrangement |
01 |
Upper side | Upper side as well, one behind the other along the shaft |
02 |
Upper side | 90° away, on the side facing away from the viewer |
03 |
Upper side | 90° away, on the side facing the viewer |
All four options keep the outlet on the upper side and move the inlet around the housing in 90° steps, which is exactly why the single pump has four of them and the multi-section housings have dozens. The codes are read from the shaft end, as the drawings are.
Ports, threads and flange bolts
| Series | Suction port | Pressure port | Flange bolts, 4 holes each |
|---|---|---|---|
| T6C | Ø38.1 mm | Ø25.4 mm | 1/2″–13 UNC × 22.4 · 3/8″–16 UNC × 19 |
| T6D | Ø50.8 mm | Ø31.8 mm | 7/16″–14 UNC × 22.3 · 1/2″–13 UNC × 23.9 |
| T6E | Ø75 mm | Ø37.1 mm | 1/2″–13 UNC × 23.4 · 5/8″–11 UNC × 24 |
Both ports take four-bolt SAE flanges on every size, and the bolt threads are inch sizes throughout. Flange kits are ordered by the port diameter, so the series letter is what selects them.
Positions 6, 7 and 8: design letter, seal class, modification
The design letter moves with the size: B on T6C and T6D, A on T6E. The mobile builds use a different pair again, so the letter belongs to the string it came from and is not worth guessing.
The seal class is the position that decides which fluid the pump may run on, and it also carries the pressure the shaft seal will take:
| Code | Class | Fluid | Shaft seal |
|---|---|---|---|
1 |
S1 | Mineral oil | NBR, up to 0.7 bar |
4 |
S4 | Fire-resistant fluids: water-glycol, water-in-oil emulsion, phosphate ester, chlorinated hydrocarbon | EPDM, up to 7 bar |
5 |
S5 | Mineral oil and fire-resistant fluids both | FKM, up to 7 bar |
The last position is the modification slot. In the ordering examples for all three sizes it is left blank; when a string does carry a value there, that value belongs to that build and is carried over unchanged.
Displacement, speed, pressure and weight by series
| Series | Displacement | Speed | Pressure, intermittent / continuous | Weight | Axial load |
|---|---|---|---|---|---|
| T6C | 10.8–100.0 cm³/r, 13 cam rings | 600–2800 r/min, 2500 r/min on the largest rings | 275 / 240 bar on anti-wear mineral oil | 15.7 kg | 800 N |
| T6D | 47.6–158.0 cm³/r, 11 cam rings | 1000–2200 r/min | Up to 280 bar, by cam ring and fluid | 24.0 kg | 1200 N |
| T6E | 132.3–268.7 cm³/r, 10 cam rings | From 1000 r/min | Up to 240 bar, by cam ring and fluid | 43.3 kg | 2000 N |
The speed figure belongs to the cam ring rather than to the size: on T6C the largest rings come down from 2800 to 2500 r/min, and T6D and T6E both start at 1000 r/min. The allowable viscosity range is 10 to 860 cSt, and the inlet line has to keep the oil under 1.9 m/s so the pump does not cavitate.
Pressure follows the fluid class and the cam ring
Two things move the rating before the size does. The fluid comes first: on anti-wear mineral oil a T6C is rated 275 bar intermittent and 240 bar continuous, non-anti-wear oil, water-glycol and synthetic fluids bring it to 210 / 175 bar, and a water-in-oil emulsion to 175 / 140 bar. The cam ring comes second: the largest T6C rings are rated 210 / 160 bar on anti-wear oil. The family ceilings are 275 bar on T6C, 280 bar on T6D and 240 bar on T6E, all of them intermittent figures with the continuous rating one step lower.
In practice that means the same pump can be quoted at two pressures without anyone being wrong, which is why a pressure figure is worth reading together with the fluid it was rated on.
From a flow requirement to a cam ring
Two steps are enough to land on a code. First divide the flow you need by the speed you will run at: Vi = 1000 × Q / n. A machine that needs 60 l/min at 1500 r/min asks for 40 cm³/r. Second, take the first cam ring above that figure — on T6C that is B14, or 014 in the other writing, at 46.0 cm³/r. The theoretical flow is then 46.0 × 1500 / 1000 = 69 l/min, and the flow actually delivered sits below it by the internal leakage of that ring at working pressure.
Two checks belong with the choice: the shaft torque limit above, read against the shaft code, and the inlet condition, which is where most disappointing installations go wrong.
One model number, decoded
Four strings that are on the shelf, read position by position:
| Model code | Reading |
|---|---|
| T6C 031 1L00 B5 | Series T6C; cam ring 031 = B31, 100.0 cm³/r; shaft 1, keyed SAE B; rotation L, counter-clockwise; porting 00, standard; design B; seal 5, mineral oil and fire-resistant fluids; modification blank |
| T6C B03 1L00 B1 | Series T6C; cam ring B03 = 10.8 cm³/r, the smallest ring in the size; shaft 1; rotation L; porting 00; design B; seal 1, mineral oil; modification blank |
| T6D 045 1L00 B4 | Series T6D; cam ring 045 = B45, 145.7 cm³/r; shaft 1, keyed SAE C; rotation L; porting 00; design B; seal 4, fire-resistant fluids; modification blank |
| T6E 042 3R00 A1 | Series T6E; cam ring 042, 132.3 cm³/r, the smallest T6E ring; shaft 3, splined SAE C; rotation R, clockwise; porting 00; design A; seal 1, mineral oil; modification blank |
T6 single: what to confirm before ordering
- Settle the series first. T6C and T6D and T6E differ in flange, port size and weight before they differ in displacement.
- Copy the cam-ring code as written. The same ring appears as
B03or003depending on the catalogue, and where a figure is quoted without a unit, check whether that catalogue prints the displacement or the delivery at 0 bar and 1500 r/min. - Watch the size on shared digits:
B14/014is 46.0 cm³/r on T6C and 47.6 cm³/r on T6D. - Read the shaft code across the sizes, then check the axial load and the Vi × p torque limit against that code.
- Match the seal class to the fluid, including the fire-resistant cases, where class
4or5is required. - Take the pressure from the fluid and the cam ring, not from the series alone.
- Confirm the rotation and the porting combination against the machine drawing, both read from the shaft end.
- State the modification position if the nameplate carries one; if the string ends at the design letter, say so.
Ordering
Send the complete code from the nameplate, or the combination you need: series, cam ring, shaft, rotation, porting, seal class. Where the pump drives a second unit, or where a cartridge kit is wanted instead of a complete pump, tell us that as well and we will confirm the cartridge against the code before the order is placed.
All pumps are supplied as new replacement units, inspected individually before dispatch.
Browse the T6 single vane pumps, the cartridge kits for the T series, or the wider T6 · T67 · T7 series.
