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Technical Specification Sheet

Document No. 149-427

January 4, 2019

Siemens Industry, Inc. Page 1 of 13

Venturi Shut-Off Air Valve

Figure 1. Venturi Shut-Off Variable Air Valve

Single Body 10” with Orifice Plate airflow sensor.

Figure 2. Venturi Shut-Off Air Valve

Cut-away view showing details of cone and shaft seals.

The Siemens Venturi Shut-Off Air Valve is a

prepackaged, easy to install airflow measurement and

control solution capable of tight shut-off. It provides

fast-acting, stable and precise airflow control of room

supply, room general exhaust, or fume exhaust.

Venturi Air Valves use specially designed springs that

move the cone control element along the central

shaft, in or out of the Venturi throat, compensating for

changes in static pressure conditions. The “Medium”

range spring delivers pressure-independent flow

control as long as the pressure drop across the air

valves stays within the range of 0.6 in. WC to 3.0 in.

WC. The “Low” range spring delivers pressure-

independent flow control as long as the pressure drop

across the air valves stays within the range of 0.3 in.

WC to 3.0 in. WC. The spring responds in less than 1

second to changes in static pressure.

The spring assemblies are sensitive to mounting

orientation. Siemens offers the valve in the horizontal,

vertical up-flow, and vertical down-flow mounting

orientations.

Shut-Off air valves incorporate seals at the shaft and

the outside edge of the cone to seal off airflow when

in the closed position. These seals result in zero

leakage with minimal close-off force. Due to the

configuration of the Venturi Air Valve, increased

upstream pressures increase the close-off force and

ensure zero leakage.

The Venturi Air Valves are available with aluminum

casing and cone, Teflon

-coated stainless steel cone

rod, and stainless steel brackets, linkage and control

arm. For corrosive applications, aluminum

components and multi-body flat flanges are coated

with Epoxy Phenolic coating. Single-body air valves

are available in nominal duct sizes 6”, 8”, 10” and 12”,

with slip ends or round flanges. For larger airflow

ranges, multiple-body air valves are offered with dual

and triple configurations, with box-end slip flanges or

flat flanges.

Siemens has improved the basic venturi concept by

adding accurate airflow measurement and true closed

loop airflow control. In both general and corrosive air

stream applications, Siemens’ orifice plate sensing

technology measures airflow with errors less than or

equal to ±5.0% of reading, down to inlet velocities of

350 fpm, with just one inlet diameter.

For multiple-body units, the pressure signal tubing of

the individual air valves are manifolded together,

which, due to the nature of the Venturi Air Valve,

produces a flow signal with the same accuracy as the

single-body units.

Siemens Venturi airflow control applications use full

PID airflow control as “fine tuning” of the Venturi Air

Valve’s calibrated relationship of control position to

airflow rate (patents pending). And while control at

inlet velocities below 350 fpm relies on the air valve’s

calibration, the airflow signal is still used for flow

status and alarming.

Summary of content (13 pages)

PAGE 1
Technical Specification Sheet Document No. 149-427 January 4, 2019 Venturi Shut-Off Air Valve Figure 1. Venturi Shut-Off Variable Air Valve Single Body 10” with Orifice Plate airflow sensor. The Siemens Venturi Shut-Off Air Valve is a prepackaged, easy to install airflow measurement and control solution capable of tight shut-off. It provides fast-acting, stable and precise airflow control of room supply, room general exhaust, or fume exhaust.
PAGE 2
For applications with fixed airflow needs, constant volume (CV) Venturi Air Valve control is available. For applications with multi-state needs, actuation options include 2-position, 3-position floating, and modulating. An entire range of controls from CV to complete Lab Room Control provides further ability to meet specific critical environment application needs.
PAGE 3
Specifications Materials (within air stream) - Standard Venturi Valve Casing 0.06” Spun aluminum (14 GA) Cone 0.04” (18 GA) Airflow Sensor Aluminum orifice Spun aluminum cone Venturi Cone Teflon-coated dashpot tube assembly Celenex (PBT) end cap & slider Stainless steel pressure spring Cone Rod 3/8-inch (.
PAGE 4
Dimensions for Single Body Air Valves NOTE: Allow 12” clearance from enclosure door and/or actuator for service. Figure 5. Shut-off Valve, Single Body Dimensions for Air Valve Flange Siemens Industry, Inc.
PAGE 5
Dimensions for Multi-Body Air Valves NOTE: Allow 12” clearance from enclosure door and/or actuator for service. Figure 6. Shut-off Valve, Multibody Siemens Industry, Inc.
PAGE 6
Part Number Configuration Sample Part Number AV Z 112 M H HSO EODP Volumetric Control Application · Variable Volume - Shut Off Z Valve Body size 106 To help you select a Body Size, see the following tables: 108 For Flow Parameters, see Table 3. 112 For Pressure Range, see Table 4 (Horizontal mounting) and Table 5 and Table 6 (Vertical mounting). 210 110 212 312 Pressure Range · Medium · Low For specific pressure ranges for Medium and Low pressure valves, see Tables 4, 5 and 6.
PAGE 7
Lab DXR BACnet IP Control Packages Airflow Pressure Sensor 1” - Normally Closed Airflow Pressure Sensor 1”- Normally Open Lab DXR(IP) standard speed with APS 1”- Normally Closed Lab DXR (IP) standard speed with APS 1”- Normally Open Airflow Pressure Sensor 1” Fail-in Place MC10 MO10 MC11/MC12* MO11/MO12* MX10 Lab DXR (IP)Standard speed with APS 1” - Fail-in place MX11/MX12* Lab DXR (IP)High speed with APS 1” - Normally Closed EC11/EC12* APS 1” -High Speed - Normally Closed APS 1” -High Speed Normally
PAGE 8
Table 3. Pressure Range – Vertical Mounting, Upflow. Flow Ranges @ Sea Level Vertical Upflow Low 0.3 to 3.0” WC Medium 0.6 to 3.
PAGE 9
Table 6. Control Packages and Part Numbers. Package Actuator3 Fail-safe1 DP Transmitter2 Off-board Air Module Controller Standard-speed Modulating MCZZ MODP MOZZ MXDP MXZZ GMA151.1P GMA151.1P GMA151.1P GLB161.1P GLB161.1P NC NO NO F.I.P. F.I.P. — 590-781 or 590-782 — 590-781 or 590-782 — — — — — — — — — — — MCLM MXLM MOLM GMA151.1P GLB161.1P GMA151.1P NC F.I.P. NO. — — — 550-819B 550-819B 550-819B 550-767DN 550-767DN 550-767DN BACnet Standard-Speed Modulating MCBO GMA151.
PAGE 10
Table 6. Control Packages and Part Numbers. Package Actuator3 Fail-safe1 Off-board Air Module Controller — DXA.S04P1 103B DXR2.E17CX103B DP Transmitter2 GLB161.1P MX12 F.I.P. Lab DXR BACnet IP High-Speed Modulating EC11 GNP191.1P NC — DXA.S04P1 DXR2.E17C103B EC12 EC10 EO10 GNP191.1P GNP191.1P GNP191.1P NC NC NO — — — DXA.S04P1 DXA.S04P1 DXA.S04P1 DXR2.E17CX103B — — EO11 GNP191.1P NO — DXA.S04P1 DXR2.E17C103B 1Fail-safe positions: NO (Normally Open), NC (Normally Closed), F.I.
PAGE 11
Single-Body Air Valve Discharge Sound Power Levels by Size and Pressure Drop Discharge Sound Pressure Drop – 0.6” WC Pressure Drop – 1.5” WC Air Valve Flow Octave Sound Power (dB) Octave Sound Power (dB) CFM (L/s) 2 3 4 Pressure Drop – 3.
PAGE 12
Single-Body Air Valve Radiated Sound Power Levels by Size and Pressure Drop Radiated Sound Pressure Drop – 0.6” WC Pressure Drop – 1.5” WC Air Valve Flow Octave Sound Power (dB) Octave Sound Power (dB) CFM (L/s) 2 3 4 Pressure Drop – 3.
PAGE 13
Multiple-Body Air Valve Discharge Sound Power Levels by Size and Pressure Drop Discharge Sound Pressure Drop – 0.6” WC Pressure Drop – 1.