YI-2B12-309 Enidine Double Bellows Imperial Air Spring

The Enidine YI-2B12-309 is a double bellows imperial air spring.

Enidine air springs are used for actuation and vibration isolation. As actuators they provide linear or angular motion; as isolators they reduce the effects of vibration, and they can isolate vibration and regulate load height at the same time. Enidine states they accept air, water, nitrogen or anti-freeze as the actuation medium.

Specifications:

Manufacturer:	Enidine
Model:	YI-2B12-309
Enidine part number:	YI2B12309
Series:	Air Spring
Type:	Double Bellows Imperial Air Spring
Max. stroke:	5.30 in
Force @ 100 psi at 2.0 in stroke:	8,050 lbs
Force @ 100 psi at 4.0 in stroke:	6,600 lbs
Force @ 100 psi at maximum stroke:	5,200 lbs
Isolator load range @ 100 psi:	5,200 – 7,200 lbs
Design height range (isolator):	7.5 – 9.5 in
Approx. system natural frequency:	1.83 Hz
Isolation at 7.25 Hz input frequency:	92%
Isolation at 14.5 Hz input frequency:	98%
Isolation at 30 Hz input frequency:	99%
Max. diameter @ 100 psi:	13.00 in
Compressed height:	3.40 in
Min. height as actuator:	4.20 in
Max. height as actuator:	9.50 in
Max. height as isolator:	11.10 in
End plate / retainer diameter (A):	9.00 in
Blind tap spacing (B):	6.20 in
Fill port offset (C):	2.87 in
End retainer style:	3
Air fitting port (NPTF):	1/4
Internal bumper:	Yes
Flex member material:	Natural Rubber

• All catalog performance data is based on 100 psi maximum operating pressure. For product selection at pressures less than 100 psi, refer to the manual selection procedure in the catalog, the E.A.S. sizing software, or contact Enidine.
• Listed strokes start from the minimum allowable height of the Air Spring.
• To obtain the lower load range limit (i.e., minimum load @ 20 psi), divide the smaller value by 5.
• In the "Isolation Specification" section, this data reflects the approximate percentage of isolation obtainable, if the design height is at the center of the design height range, and the load per air spring is within the isolator load range. Note: For values other than 100 psi, consult factory.

Source: Enidine 2026 price list; specifications from the Enidine air spring catalogue (imperial double convolute bellows selection chart, printed pages 12-13); enidine.com, Air Springs.