Constant-Temperature Pneumatic-Lid Benchtop Thermal Bath for Laboratories
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Constant-Temperature Pneumatic-Lid Benchtop Thermal Bath for Laboratories
Engineered for laboratory testing teams and commercial procurement partners, this pneumatic-lid benchtop thermal bath combines convenient operation with precise temperature control for various lab applications. It maintains 15°C to 95°C with ±0.5°C accuracy, features adjustable pneumatic lids and automatic water level control, and delivers 70% energy savings with robust construction to meet ISO 1167 and ASTM D1598 testing standards.
GT-TEST constant-temperature pneumatic-lid thermal bath (Model GT-TANK-P) delivers precise temperature control for hydrostatic pressure testing of thermoplastic pipes and fittings in laboratory and controlled-production environments. Engineered for laboratory testing teams and commercial procurement partners, the bath maintains a temperature range of 15°C to 95°C with ±0.5°C accuracy and ±0.1°C resolution. A pneumatically operated lid allows operators to adjust the opening degree according to specimen requirements, and three different lid-system configurations are available. Automatic water-level control replenishes water while limiting temperature fluctuation to less than 0.2°C. High-efficiency thermal insulation keeps the outer surface near ambient temperature at 95°C and reduces energy consumption by more than 70%. The braced structure provides rigidity and deformation resistance for long-duration test runs.
Key Design Features of Pneumatic-Lid Thermal Baths
Pneumatically Operated Adjustable Lid
The lid is raised and lowered by a pneumatic actuator, allowing the operator to set the opening degree based on specimen size and access requirements. The pneumatic mechanism reduces the physical effort required to open and close heavy lids on larger bath units, and the sealed lid contains steam and heat to protect operators from burn injuries.
Three Available Lid-System Configurations
The bath is offered with three distinct lid systems to match different testing workflows: a standard sealed lid, a pneumatic lift lid, and a segmented access lid. Clients select the configuration based on specimen handling frequency, pipe diameter, and laboratory layout.
Automatic Water-Level Control
When the water level falls below the programmed value, the system introduces makeup water through a controlled inlet that limits temperature fluctuation to less than 0.2°C. This feature is relevant for tests running over thousands of hours where evaporation would otherwise alter test conditions.
Circulation and Uniform Temperature Distribution
A circulation pump ensures even temperature distribution throughout the bath volume. Quick-release couplings and an ergonomically arranged manifold simplify the connection of multiple specimens across the available test stations.
Technical Specifications for Pneumatic-Lid Constant-Temperature Baths
Parameter
Value
Model
GT-TANK-P
Brand
GT-TEST
Temperature range
15°C to 95°C
Temperature accuracy
±0.5°C
Temperature resolution
±0.1°C
Water-level fluctuation
Less than 0.2°C during automatic refill
Lid operation
Pneumatic, adjustable opening degree
Lid system options
3 configurations available
Internal dimensions
Depend on pipe diameter (custom configurable)
Number of test stations
1 to 50 (on request)
Applicable standards
ISO 1167, ASTM D 1598, ASTM D 1599
Applicable Standards for Laboratory Thermal Baths
ISO 1167 Compliance
The bath provides the constant-temperature water environment required by ISO 1167 for internal pressure resistance testing of thermoplastic pipes and fittings. The circulation system maintains uniform temperature across all stations.
ASTM D 1598 and ASTM D 1599 Compliance
For ASTM D 1598 time-to-failure and ASTM D 1599 short-time burst testing, the bath's temperature accuracy and stability support the specified test conditions. The automatic water-level control is particularly valuable for the extended durations covered by ASTM D 1598.
Industrial Applications of Pneumatic-Lid Thermal Baths
This thermal bath serves testing laboratories, pipe-manufacturer R&D departments, and certification bodies that perform hydrostatic pressure tests on PE, PEX, PVC, PP, and PB pipes and fittings. The pneumatic lid is advantageous for facilities that require frequent specimen access, as it reduces operator fatigue and improves safety when handling hot water. The scalable station count from 1 to 50 and customizable internal dimensions allow the same platform to serve both small-scale laboratory testing and high-throughput production quality control.
FAQ
What is the temperature range and accuracy of the bath?
The bath operates from 15°C to 95°C with a temperature accuracy of ±0.5°C and a resolution of ±0.1°C.
How does the pneumatic lid work?
The lid is operated by a pneumatic actuator that allows the operator to adjust the opening degree. This reduces physical effort and enables controlled access to specimens while the bath is at operating temperature.
What are the three lid-system options?
The available configurations are a standard sealed lid, a pneumatic lift lid, and a segmented access lid. The appropriate configuration depends on specimen size, handling frequency, and laboratory workflow.
How many test stations can be configured?
The bath supports 1 to 50 test stations, with internal dimensions customized to the pipe diameter being tested.
How does the automatic water-level control affect temperature stability?
When makeup water is introduced, the system limits the resulting temperature fluctuation to less than 0.2°C, preserving test conditions during long-duration pressure tests.
