zwublack 2

The Schönn Zone Wall Unit (ZWU) is designed to provide a zone isolation, maintenance system and a physical break point.

The ZWU provides additional facilities which enable connection of an emergency gas supply, purging and gas sampling.

ZWU’s are fitted to all medical gas/vacuum services in a prominent and accessible position at the entry to wards, intensive care units operating rooms etc. to the recommendations of HTM 2022 HTM 02-01 C11, EN 737 and ISO EN 7396-1:2007.

The unit has got 2, 3, 4, or 5 Area Valve Service units and also an Alarm Panel for controlling medical gas services such as Oxygen, Nitrous Oxide, Medical Air 4 Bar, Medical Air 7 Bar and Medical Vacuum.

The Unit includes copper stubs on the top for easy installation.

The unit is painted with electrostatic powder paint.

It has got an esthetic appearance precise manufacturing, high quality. It collects the valves and its pipes in al limited space.



The Unit provides easy access to the valves and pressure switches.

  • Meets the requirements of C!!, HTM 2022, HTM 02-01, EN 737 and ISO 7396-1:2007
  • Steel construction giving greater fire retardancy.
  • Easy clean surfaces.
  • Internal segregation of valves avoids inadvertent isolation of wrong zone or gas.
  • Individual keyed access to each valve provides additional security.
  • Break glass panel for easy access to valves in emergency situation
  • Each block has the name of the gas passing inside on embossed an inedible.
  • Incorporates high quality medical ball valves with detachable adapter.s
  • 100% leak tightness NIST connections each side of valve fitted as standard.
  • Access to the system may be closed and fed with remote supply hose attaches to NIST connector.
  • Supplied pre-piped, pre-wired and tested for easy of installation.
  • Unit incorporates local pressure switches and alarms.

The system is micro-check controlled and supports communication at RS-485 connection mode. Pressure and vacuum switches are connected to the alarm panel according to the service.

The alarm panel displays the values received from the micro checker switches.

In case the pressure values of the gas received trespass the predefined values (in memory), it will send an audio and visual warning; the gas which has a risk priority will be displayed on the screen.

The front screen section consists of button group, display, and LED lights grouped according to gas groups.

The information of alarm current state, test and fault contains can be visually followed tight the help of buttons, display and LED lights which is activated by the signals coming from the gases at the pie lines.

Any gas signal column is chosen via the button it signifies; the sets for the address, calibration, high and low pressure values can easily be seen and can be set as desired (can be entered in memory).

MPX Pressure Sensor

Integrated Silicon Pressure Sensor ON-Clip Signal Conditioned, Temperature Compensated and Calibrated.

The MPX5100 series piezoresistive transducer is a state-of-the-art monolithic silicon pressure sensor designed for a wide range of applications, but particularly those employing a micro controller or microprocessor with A/D inputs. This patented, single element transducer combines advanced micro machining techniques, thin*film metallization, and bipolar processing to provide an accurate, high level analog output signal that is proportional to the applied pressure.






-2.5% Maximum Error over 0é to 85éC

- Ideally suited for Microprocessor or Microcontroller-Based Systems

-Patented Silicon Shear Stress Strain Gauge

- Available in Absolute, Differential and Gauge Configuration

- Durable Epoxy Unibody Element

- Easy-to-Use C


hipCarrier Option





Freescale designates the two sides of the pressure sensor as the Pressure (P1) side and the Vacuum (P2) side. The Pressure (P1) side is the side containing flour silicone gel which protects the die from harsh media. The MPX pressure sensor is designed to operate with positive differential pressure applied, P1>P2.

The Pressure (P1)side may be3 identified by using the table below.

Part Number Case Type  Pressure (P1) Side Identifier

Stainless Steel Cap, Side with Part Marking, Side with Port Attached


Minimum Recommended Footprint for Surface Mounted Application

Surface mount board layout is a critical portion of the total design. the footprint for the surface mount packages must be the correct size to ensure proper solder connection interface between the board and the package. With the correct footprint, the packages will self align when subjected to a solder reflow process. It is always recommended to design and shorting between solder.