SIEMENS QBE3190UD25 Wet Differential Pressure Sensor Instruction Manual

: October 30, 2023
: SIEMENS

Table of Contents

SIEMENS QBE3190UD25 Wet Differential Pressure Sensor
Product Information
Product Usage Instructions
Pressurizing the System
Product Mounting
Product Description
Product Numbers
Pressure Rating
Required Tools
Prerequisites
Installation
Installing the Sensor/Manifold Assembly
Wiring
Mounting the Sensor/Manifold Assembly
Read User Manual Online (PDF format)
Download This Manual (PDF format)

SIEMENS QBE3190UD25 Wet Differential Pressure Sensor

Product Information

The Siemens Wet Differential Pressure Sensor with Manifold Assembly is a unidirectional sensor that utilizes ceramic technology making it ideal for various industries. It comes with a three-valve manifold and has three different product numbers: QBE3190UD25, QBE3190UD50, and QBE3190UD100, with differential pressure ratings ranging from 0-25 psi to 0-100 psi. The burst pressure on the high side varies from 543 psi to 72 psi depending on the product number. The sensor is rated for a pressure rating of 290 psi.

Product Usage Instructions

Installation

Assemble compression fittings to the manifold finger-tight, and then tighten a minimum of 2 to 3 turns with a 5/8 wrench or to a maximum of 25 ft-lbs (34 Nm).
Insert the HIGH and LOW-pressure lines into the appropriate pressure port compression fittings at the bottom of the manifold. Be sure to fully insert the pressure lines against the inside shoulder and finger-tighten the nut.
While holding the fitting body with the 9/16 wrench, tighten the nut 1-1/4 turn with the 1/2 wrench.

Pressurizing the System

Before pressurizing the system, ensure that valves V1 and V2 are closed and valve V3 is open.
Pressurize the system, and then slowly open valves V1 and V2 while closing valve V3.

Wiring

Use a Phillips or flat-blade screwdriver to completely remove the mounting screw from the conduit cap.
Use a flat-blade screwdriver to pry up the termination board where indicated (LIFT is embossed on the cover).
Feed wiring through the conduit cap and terminate wires as shown.
Snap the termination board back into the conduit cap.
Remove the white protective cap from the sensor.
Insert the rubber gasket onto the sensor’s metal leads. Ensure that the lead slots in the conduit cap are oriented to the sensor’s metal leads.
Snap the conduit cap onto the sensor.
Replace and secure with the mounting screw.

Product Mounting

Use two screws or the required number of nylon tie wraps to mountthe sensor/manifold assembly.

CAUTION

Personal injury or loss of life may occur if the procedures are not followed as specified. Equipment damage or loss of data may occur if the procedures are not followed as specified.

Wet Differential Pressure Sensor with Manifold Assembly

Product Description

The Siemens Wet Differential Pressure Sensors utilize a unique, well-proven ceramic technology making them ideal for applications across a broad spectrum of industries. These sensors are unidirectional with a three-valve manifold.

Product Numbers

Product Number| Burst Pressure on High Side (psi)| Differential Pressure Rating (psi)| *Differential pmax. (psi)
---|---|---|---
QBE3190UD25| **

543

| 0 to 25| 72
QBE3190UD50| 0 to 50| 116
QBE3190UD100| 0 to 100| 290

Pressure Rating

CAUTION

The maximum manifold pressure rating is 250 psi.
Reference the sensors’ pmax. rating.
Exceeding the recommended pressure will damage the sensor.

Warning/Caution Notations

WARNING:| ****| Personal injury/loss of life may occur if you do not follow the

procedures as specified.

---|---|---
CAUTION:| ****| Equipment damage/loss of data may occur if you do not follow the procedures as

specified.

Contents

Sensor/manifold assembly
Rubber gasket
Non-conduit assembly kit
Conduit cap

Required Tools

Thread sealant (Loctite 565 or equivalent)
(2) crescent wrenches: 1/2”, and 9/16”
Small, Phillips screwdriver
Small, flat-blade screwdriver
(2) 6-32 sheet metal screws or nylon tie wraps

Installation Time

30 minutes

Prerequisites

Use two male connector compression fittings with 1/4”-18 NPT threads rated for system pressure for the HIGH and LOW-pressure ports of the manifold.
Prepare the fittings with Loctite 565 Thread Sealant or equivalent anaerobic liquid to prevent leakage.

CAUTION
Do not use putty, gasket-type material, or tape.

Installation

Pressurizing the System

Before the system is pressurized ensure that:
- Valves V1 and V2 are closed.
- Valve V3 is open.

Installing the Sensor/Manifold Assembly

Assemble compression fittings to the manifold finger-tight, and then tighten a minimum of 2 to 3 turns with a 5/8” wrench or to a maximum 25 ft-lbs (34 Nm). See Figure 2.
Insert the HIGH and LOW-pressure lines into the appropriate pressure port compression fittings at the bottom of the manifold. Be sure to fully insert the pressure lines against the inside shoulder and finger-tighten the nut.
While holding the fitting body with the 9/16” wrench, tighten the nut 1-1/4 turn with the 1/2” wrench.
Pressurize the system, and then:
- Slowly open valves V1 and V2.
- Close valve V3.

Wiring

Use a Phillips or flat-blade screwdriver to completely remove the mounting screw from the conduit cap.
Use a flat-blade screwdriver to pry up the termination board where indicated. (LIFT is embossed on the cover.) See Figure 3.
Feed wiring through the conduit cap and terminate wires as shown.
NOTE: For non-conduit installations, insert the plastic connection with the washer from the Non-conduit Assembly Kit before terminating the wires.
Snap the termination board back into the conduit cap.
NOTE: The termination board can be oriented in any direction.
Remove the white, protective cap from the sensor.
Insert rubber gasket onto sensor’s metal leads. Observe the different slot sizes on the gasket.
CAUTION: Lead slots in the conduit cap must be oriented to the sensor’s metal leads.
NOTE: The ground lead may appear slightly bent, but do not attempt to straighten it. Insert the ground lead into the conduit cap first to correct any alignment issues.
Snap the conduit cap onto the sensor.
Replace and secure with the mounting screw.

Mounting the Sensor/Manifold Assembly

Use two screws or the required number of nylon tie wraps to mount the sensor/manifold assembly.
Ensure that the sensor is mounted vertically. The conduit cap may be positioned to face left, right, front, or back.
If air bleeding is desired:
- Carefully loosen the two nuts of the compression fittings assembled to the sensor. See Figure 7.
  NOTE: While holding the fitting body with the 9/16” wrench, loosen the nuts with the 1/2” wrench.
- Carefully tighten the nuts after bubble-free media flows out.

The installation is now complete.

Information in this publication is based on current specifications. The company reserves the right to make changes in specifications and models as design improvements are introduced. Product or company names mentioned herein may be the trademarks of their respective owners. © 2012 Siemens Industry, Inc.

Siemens Industry, Inc.