3719 pHORP WetTap

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3719 pH/ORP Wet-Tap
New!
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Table of Contents

• Product Description
• System Components
• Features, Advantages and Benefits
• Key Technical Specifications
• Target Applications
• Installation
• Ordering Information

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3719 Product Description

• The GF SIGNET 3719 pH/ORP Wet-Tap allows
  installation and removal of pH or ORP electrodes
  without the need for process shutdown during
  routine electrode maintenance and calibration.
  Process isolation is achieved with a double
  O-ring seal on a unique and compact retraction
  assembly no separate valve is required.
• A cam-activated automatic locking mechanism,
  SafeLoc, and the short stroke design help to
  assure operator safety.

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3719 System with Twist-Lock Components

• a) 3719 pH/ORP Wet-Tap
• b) Low Profile PP Clamp-on Saddle
• Fitting (ASTM sizes 2.5 to 12)
• c) 271x-WT Twist-Lock pH or ORP
• Electrode (Twist-Lock refers to
• the electrode connector style)
• d) 2720 Twist-Lock Preamplifier
• e) GF SIGNET pH/ORP Instrument
• All of these components are sold separately.

d
c
a
b
e
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3719 System with DryLoc Components

• a) 3719 pH/ORP Wet-Tap
• b) Low Profile PP Clamp-on Saddle
• Fitting (ASTM sizes 2.5 to 12)
• c) 275x-WT DryLoc pH or ORP Electrode
• (DryLoc refers to the electrode
• connector style)
• d) 2750 DryLoc pH/ORP Sensor w/ J-Box
• e) Output signal options
• - S3L
• - 4 to 20 mA
• All of these components (items a to d) are
• sold separately.

e
c
d
a
b
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Features, Advantages and Benefits

• Features
• F1) Automatic (valveless) process isolation upon
  Wet-Tap retraction
• F2) SafeLoc cam-activated automatic locking
  mechanism
• F3) Short stroke between the fully-inserted and
  retracted positions
• F4) Sealed pneumatic dampening of electrode
  piston
• F5) Electrode design allows installation in any
  orientation
• F6) Low-profile PP clamp-on saddle fittings with
  stainless steel hardware

• Advantages
• A1) Removes electrodes from pressurized systems
• A2) Locks assembly in the fully-inserted and
  retracted positions
• A3) Allows a more compact design with minimal
  danger zone
• A4) Slows stroke and reduces internal impact upon
  retraction
• A5) Facilitates horizontal or inverted Wet-Tap
  mounting options
• A6) Guarantees proper position of electrode tip
  in the process stream

Benefits B1) Eliminates process downtime during
routine electrode maintenance B2) Safety feature
helps operators avoid inadvertent
spills B3) Increases installation versatility and
operator safety B4) Provides smooth, safe
operation and extends service life B5) Improves
installation versatility and system accessibility
B6) Completes a simple, corrosion resistant
offering from Signet
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Key Technical Specifications

• Wet-Tap
• Compatibility 271x-WT Twist-Lock Electrodes
• 275x-WT DryLoc Electrodes
• Process Connections 3719-x1 1.5 or 2 NPT
• 3719-x2 ISO 7/1-R 1.5 or R 2
• Operating Pressure 100 psi (6.9 bar) maximum
• Process Temp 0 to 80C (32 to 176F)
• Pipe Size Range Up to 12 in. (use accessory
  saddle fittings 2.5 to 12)
• Materials
• Retraction housing CPVC
• Locking shroud PVC
• O-rings FPM
• Hardware 316SS
• Max. Flow Velocity 10 ft/s (3.05 m/s)
• Clamp-on Saddle Fittings
• Size Range ASTM sizes 2.5 to 12
• Materials
• Saddle body Polypropylene

• Electrode
• Compatibility 3719 pH/ORP Wet-Tap
• Connector (CPVC) Twist-Lock or DryLoc
• Efficiency 97 _at_ 25C (77F)
• Response Time pH
• ORP Application dependent
• Drift
• Operating range pH 0 to 14 pH
• ORP -2000 to 2000 mV
• Accuracy 0.1 over full range
• Ref. Junctions Porous PTFE
• Electrolyte 3.5M KCl
• Elements Ag/AgCl
• Temp. Sensor (pH) 3K Balco (Twist-Lock)
• PT-1000 (DryLoc)
• Temp. Pressure 6.9 bar _at_ 65C (100 psi _at_ 149
  F)
• Impedance (pH)
• Wetted Materials
• Body Glass

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Target Applications

• Aquatic Animal Life Support Systems
• Recreational Water Monitoring
• Scrubber Control
• Water Wastewater Treatment
• Effluent Monitoring
• Neutralization Systems
• Surface Finishing
• Heavy Metal Removal
• Sanitization Systems
• Toxics Destruction

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InstallationPipe sizes 2.5 to 12

• For reliable in-line measurements of pH and ORP,
  it is imperative to position the electrode tip
  into the process stream.
• Because of its compact short stroke design, the
  3719 requires low-profile fittings to assure
  proper positioning in pipe sizes 2.5 to 12
  inches.
• Utilization of the accessory saddle fittings,
  offered as part of the 3719 system, is strongly
  recommended.
• Choose the 3719 version (-11 or -21) appropriate
  to the size of the branch connection of the
  required fitting
• Use -11 for sizes 2.5 to 4, and -21 for sizes 6
  to 12.

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InstallationPipe sizes below 2.5

• It is possible to install the 3719 into pipe
  sizes below 2.5 inches by creating a flow cell
  with standard piping components.
• One simple solution, using a GF SCH 80 PVC tee
  and reducer bushings, is shown in the example to
  the right.
• Many similar configurations are conceivable in a
  wide variety of materials, but be very careful to
  verify dimensional compatibility.
• Select an appropriate installation orientation to
  avoid the entrapment of air inside the flow cell.

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InstallationWet-Tap into Fitting
1. Grasp the retraction housing below the locking
shroud turn the locking shroud 1/4-turn
clockwise. 2. Pull the locking shroud straight
up until both O-rings are seated inside the
retraction housing. 3. Turn the locking shroud
1/4-turn counterclockwise and lift it completely
away from the electrode piston. 4. Thread the
Wet-Tap assembly into the pipe fitting. Note
smaller pipes may require bracing to support the
Wet-Tap weight and the longitudinal forces
required for operation. The piping system may
now be pressurized.
Locking Shroud
Retraction Housing
Electrode Piston
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InstallationElectrode into Wet-Tap
1. Slide electrode (Twist-Lock or DryLoc)
straight down into electrode piston. Thread
electrode into place until connector shoulder is
flush with top of electrode piston. Hand tighten
only. 2. Place the Locking Shroud over
electrode turn 1/4-turn clockwise to unlock the
piston, then press down firmly on the locking
shroud to lower the electrode piston into the
pipe. 3. Turn the Locking Shroud 1/4-turn
counterclockwise to lock the piston. 4. Install
the 2750 DryLoc pH/ORP Sensor or 2720 Twist-Lock
Preamplifier onto the electrode
connector. 5. Reverse these steps for electrode
removal.
2750
2720
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Ordering Information
Mfr. Part No. Code Description 3-3719-11 159
000 804 Wet-Tap Assembly, 1.5 in.
NPT 3-3719-21 159 000 805 Wet-Tap Assembly, 2
in. NPT 3-3719-12 159 000 806 Wet-Tap
Assembly, ISO 7/1-R 1.5 3-3719-22 159 000
807 Wet-Tap Assembly, ISO 7/1-R
2 3-2716-WT 159 000 809 Twist-Lock pH
Electrode (use with 2720 Preamplifier) 3-2717-WT
159 000 811 Twist-Lock ORP Electrode (use with
2720 Preamplifier) 3-2720 198 864
602 Twist-Lock Preamplifier, 3/4 in.
NPT 3-2720-2 198 864 603 Twist-Lock
Preamplifier, ISO 7/1-R 3/4 3-2756-WT 159 000
834 DryLoc pH Electrode (use with 2750
Sensor) 3-2757-WT 159 000 835 DryLoc ORP
Electrode (use with 2750 Sensor) 3-2750-1 159
000 744 In-line DryLoc pH/ORP Sensor with
J-Box 3-2750-2 159 000 745 In-line DryLoc
pH/ORP Sensor with J-Box and EasyCal 2007-0225 1
59 000 812 PP Clamp-on Saddle, 2.5 in. x 1.5 in.
(ASTM, NPT) 2007-0230 159 000 813 PP Clamp-on
Saddle, 3 in. x 1.5 in. (ASTM, NPT 2007-0240 159
000 814 PP Clamp-on Saddle, 4 in. x 1.5 in.
(ASTM, NPT) 2007-0260 159 000 815 PP Clamp-on
Saddle, 6 in. x 2 in. (ASTM, NPT) 2007-0280 159
000 816 PP Clamp-on Saddle, 8 in. x 2 in. (ASTM,
NPT) 2007-0210 159 000 817 PP Clamp-on Saddle,
10 in. x 2 in. (ASTM, NPT) 2007-0212 159 000
818 PP Clamp-on Saddle, 12 in. x 2 in. (ASTM,
NPT)