|B||with dipstick (not available in size 57-G3/4 and size 70-G2)|
|57||G 3/4||-||350 Opening pressure||700* Opening pressure||35||16||56||13||6||48||-||-||-|
|70||G 3/4||-||350 Opening pressure||700* Opening pressure||35||16||68||15||6||63||-||-||188|
|70||G 1 1/4||-||350 Opening pressure||700* Opening pressure||-||25||68||17||-||59||-||-||195|
|70||G 2||-||350 Opening pressure||700* Opening pressure||-||25||68||17||-||59||-||-||-|
|70||-||BA 39||350 Opening pressure||700* Opening pressure||-||25||68||-||-||-||14||56||195|
Filter combination produces no result.
Breather caps GN 774 with double valve are normally used if the oil container is under pressure and if outside air has to flow back in to compensate for the vacuum caused by falling oil level.
Pressure curve Δp [mbar] in the container as
Level markings and special lengths GN 109 for oil dipsticks are available for the standards shown above. The dipstick is shortened to the length l1 and the marking notches are milled in at l2 or l3 with the effect that they are easily visible. The maximum length l1 is given in the appropriate standard. The length specifications l1 to l3 refer to the contact surface without seal, with a tolerance of ±1 mm to be taken into account. For critical applications and depending on standard, the seal must be taken into consideration with a thickness of as much as 2 mm.