You may also submit a request by e-mail. Be sure to include the business identification number, and the business name and address in the text of your message. If you write to PO Box 252, Trenton, NJ 08646-0252, please allow 15 to 20 working days to receive your certificate.e sure to include the business identification number, and the business name and address in the text of your message. If you write to PO Box 252, Trenton, NJ 08646-0252, please allow 15 to 20 working days to receive your certificate.
A) End expiration: At rest, intrapleural pressure must remain slightly negative (here it is shown as -5 mmHg) as i) the lung is elastic and has a tendency to collapse or shrink, and ii) the fluid lining the alveolar surfaces generates surface tension that works to collapse the lung.
The pressure regulator  or reducing valve  fits the yoke of the oxygen tank. It reduces the pressure of oxygen flow from 2,000 psi to levels of 40-70 psi, a safe delivery for patients. Positive pressure devices, or demand valve resuscitators, deliver approximately 60 liters of oxygen per minute in short bursts.