Model 327 Volumetric Line Leak Detector

Utilizing a highly accurate flow sensor, the Model 327 Volumetric Line Leak Detector provides an industry-leading method for detecting and measuring leaks in fuel lines. The VLLD can test volumes for pipes measuring from 1.5 inches to 4 inches (3.8 cm to 10.2 cm) in diameter (the largest pipe in the industry), and can monitor rigid pipe, flexible pipe or a combination of both, making the VLLD the ideal leak detection solution for any site configuration.

327 Volumetric Line Leak Detector

Features & Benefits

Model 327 VLLD Features

Accurate: Compared to pressure-decay methods that use algorithms and user data to determine flow rates, the VLLD reads actual flow volumes to provide a true volumetric line leak measurement

Versatile: The VLLD works with a combination of fiberglass and flex pipe and can measure leak rates for the largest pipes in the industry

Economical: Line Leak Interface Module is mounted separately near STP motor relays to eliminate the need to run pump-control wires back to the tank gauge console

Easy to Install: The VLLD easily installs in the 2-inch (5.08 cm) STP leak detector port and simplifies configuration by eliminating the need to know exact line lengths or diameters of underground pipes

How OPW’s VLLD Works:

VLLD Features

Provides a true volumetric line leak test
Capable of >3 gph (11.4 L/h) catastrophic line leak test, even if an STP relay fault condition occurs where the STP motor is in a continuous run state
Installs into the 2-inch (5.1 cm) leak detector port on the submersible turbine pump (STP) motor
Capable of connecting three (3) VLLD sensors via one (1) three-conductor wire back to the building
Capable of testing the largest pipe volume in the industry: 1.5-inch (3.8 cm), 2-inch (5.1 cm), 3-inch (7.6 cm) and 4-inch (10.2 cm) pipe
Capable of controlling up to four (4) STP motors within a single-line manifold set
Capable of controlling two separate STP motors installed in the same tank
Eliminates the need to know exact line lengths or diameters of underground pipe
Works with a combination of fiberglass and flex pipe
Configurable for STP motor control as a way to bring all tanks in a manifold set down evenly either by percent of volume in the tank or until a user-defined product level is reached before switching over to another tank in the manifold set
Reduces installation cost - Line Leak Interface Module (LIM) is mounted separately, near STP motor relays, to eliminate the need for running pump-control wires back to the tank-gauge console
LIM is capable of controlling up to four (4) STP motors
Will shut off STP motor if a low-level alarm or probe failure has occurred
Programmable to run an optional monthly 0.2 gph (0.76 L/hr) or annual 0.1 gph (0.38 L/hr) compliance test
Reduces installation time by eliminating the need to run a line-leak calibration test to determine the leak characteristics of the pipe
Runs precision tests at the pump’s operating pressure
Reduces hydraulic hammering on the dispenser meters

Pipe Characteristics

Pipe Diameter	Flex Pipe Length	Rigid Pipe Length
1.5 in (3.8 cm)	1,187 ft (362 m)	4,628 ft (1,411 m)
2 in (5.1 cm)	668 ft (204 m)	2,603 ft (793 m)
3 in (7.6 cm)	297 ft (91 m)	1,157 ft (353 m)

VSmart Module I.S. Barrier

Listings & Certifications

				U.S. Patent No. 8,316,695

Applications

Able to perform >3 gph (11.4 L/hr) catastrophic line leak test, even if a submersible turbine pump motor is in continuous operation
Capable of connecting three VLLD sensors via one three-conductor wire back to the building
Can control up to four STP motors within a single-line manifold set

Technical Specifications

Specifications

Type: Volumetric Line Leak

Material: Hardened Anodized Aluminum

Location: Hazardous, Class 1, Division 1, Group D

Temperature Range: -40°F to 140°F (-40°C to 60°C)

Data Cable: 1,000 ft (305 m) Belden 88760; 500 ft (152 m) maximum Belden 88761

Leak Test Certification

Leak rate of 3.0 gph (11.4 L/hr) at 10 psi with Pd = 100% and Pfa = 0%
Leak rate of 0.2 gph (0.76 L/hr) at operating pressure with Pd = 100% and Pfa = 0%
Leak rate of 0.1 gph (0.38 L/hr) at 1.5 times operating pressure with Pd = 97.9% and Pfa = 2.1%

Downloads

Technical Manuals

Related Products

OPW-FMS

Model 327 Volumetric Line Leak Detector

Model 327 VLLD Features

How OPW’s VLLD Works:

VLLD Features

Pipe Characteristics

VSmart Module I.S. Barrier

Listings & Certifications

Specifications

Leak Test Certification

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Data Sheet

Brochure

Technical Manuals

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