LCN did at one time offer a 4040SP pneumatic single-point hold open closer. It was available by ST3004 only and was obsoleted back in 2011. The 4040SP had a small air cylinder in the track, which required 30-50psi to hold the door open. The 4040SP was used with the 7900SP pneumatic control box(ST3005). There are no replacement parts available for this obsolete offering.
The closest product to the 4040SP is the current 4040SE. The 4040SE is electrified single-point hold open.
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