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The Type T tester is a dead-weight tester that offers laboratory accuracy in an instrument designed to withstand an industrial environment or the daily stresses of a manufacturing environment. Each tester features a re-entrant type measuring piston and cylinder assembly. This design reduces the rate of fluid leakage and increases float time, helping to maintain accuracy as test pressures increase.
The Type T tester is a dead-weight tester that offers laboratory accuracy in an instrument designed to withstand an industrial environment or the daily stresses of a manufacturing environment. Each tester features a re-entrant type measuring piston and cylinder assembly. This design reduces the rate of fluid leakage and increases float time, helping to maintain accuracy as test pressures increase.
The M&G Type T Hydraulic Deadweight Tester offers laboratory accuracy in an instrument that is designed to withstand an industrial environment. These testers are designed to be primary pressure standards and are available in several ranges and engineering units.
The DM-TQ testers are available in ranges from 1 to 1000 kg/cm
Features
Three accuracies available
Applications
These instruments are available in ±0.100%, ±0.025%, and ±0.015% of reading. The accuracy stated is the overall accuracy of the tester. The accuracy takes into account linearity, hysteresis, and repeatability. It would also account for intrinsic corrections. Site corrections are the user’s responsibility and the unit will not perform as specified without them. The testers are manufactured to either an International Standard Gravity of 9.80665 m/s2 or to a user-specified local gravity.
Re-entrant piston/cylinders
The Type T deadweight employs a re-entrant type piston/cylinder assembly. This design applies test fluid to the outside and inside of the cylinder. Unlike a simple piston/ cylinder, this configuration reduces clearance between the piston and cylinder as pressure increases. This reduces the rate of fluid leakage and increases float time, offers the technician more time for testing, and reduces the amount of pumping necessary to sustain the fluid loss.
Configurations
There are two important factors in the selection of the proper deadweight configuration for your application: ranges and location. If you have applications for a single range of tests, then a single piston/cylinder model is a good choice. However, if you have some high-pressure and some low-pressure testing, the Type T is available with dual-piston/ cylinder assemblies that are interchangeable and operate using the same weight set (±0.100% and ±0.025% accuracies) or utilize dedicated weight sets for each piston/cylinder assembly (±0.015% accuracy).
If you have the need to use the tester in a location other than a lab, you may need a smaller and more mobile configuration. The single column configuration will be your best selection. These are available with dual piston/cylinder assemblies. For the applications where the tester will be stationary, the dual column configuration is a good choice for those needing multiple ranges. These are supplied with two piston/cylinder assemblies and both columns are installed and ready for use. A selector valve is used to determine which column is in service at any given time.
Worldwide engineering units
The M&G Type T deadweight tester can be manufactured in four different engineering units: psi, bar, kgt/cm2 , and kPa. All of the different engineering units are available in any of the configurations.
Pressure media
Because the Type T is manufactured using 300 series stainless steel and Monel, you can use either hydraulic fluids compatible with the material or a water/alcohol mixture. We also offer EPT and Viton® o-rings as options. This increases your media options. Additionally, we offer an isolation membrane to protect your piston/cylinder assemblies from abrasive media. This facilitates the use of other fluids as process media but allows for the benefits of MGAAA oil within the column, which preserves your calibrated parts.
Overhung weight carriers
Another feature of the Type T deadweight tester is the way that the weights are positioned on the carrier. M&G utilizes an overhung weight carrier design. This design employs a tube carrier that is positioned over the column and onto the piston driver. The center of gravity for the stack of weights is lowered, reducing side thrust and friction; which lengthens the life of the piston/cylinder assembly. This also improves measurement accuracy.
Protected piston/cylinder
The piston and cylinder assembly are enclosed in the column of the tester. The weight carrier floats on the piston driver preventing damage to the piston/cylinder assembly. Additionally, the piston/cylinder assembly is engineered with positive over-pressure protection by restricting vertical movement. This protects the assembly from damage in the event of weight removal under pressure.
Dual volume pump
The Type T pump offers a dual-volume pumping feature that allows for a large volume of fluid to be added at low pressures to fill the system and increase pressure rapidly. Once the system is filled, you can switch the output volume to a smaller volume. This eases pumping and also provides for finer control in higher pressure ranges. The reservoir is kept at atmospheric pressure meaning that you can also refill the tester during a calibration run.
Easy Leveling
AMETEK floating ball testers incorporate a bulls-eye level for reference when preparing the unit for use. The tester also employs a 3-leg leveling system which is more convenient and is superior to a 4-leg system.
Small incremental weight sets are avaliable (sold separately) to provide fractional output pressures. These are available for the Type T deadweight tester in psi, bar, kPa and kg/cm2.
| Pressure Range | Up to 1000 kg/cm2/1000 bar/100,000 kPa (model dependent) |
| Accuracy | ±;0.015% rdg |
| Increments | Low to minimum: 0.5 kg/cm"2, 0.5 bar, 50 kPa High to minimum: 5 kg/cm"2, 5 bar, 500 kPa Small: Small incremental weight sets available (optional sold separately) |
| Gravity | 980.665 gals (international standard) Local gravity available (specify when ordering) |
| Piston/Cylinders | Dual |
| Columns | Dual |
| Weight Sets | Single or dual (as ordered) |
| Pressure Source | Lever action Hand-actuated Dual volume hydraulic pump |
| Medium | Distilled water/alcohol mix (standard) or AAA oil (optional sold separately) (specify when ordering) |
| Reservoir Capacity | 75"3 (1.23 L) |
| Displacement | High range: 0.17 to 0.20"3 (2.8 to 3.2 cc) per stroke Low range: 0.018 to 0.024"3 (0.30 to 0.40 cc) per stroke |
| Wetted Surfaces | 300 series stainless steel, monel |
| O-Rings | Buna N (standard), EPT (optional sold separately), Viton (optional sold separately) (specify when ordering) |
| Test Connections | ¼" (0.64 cm) NPT, ½" (1.27 cm) NPT, 7⁄16" (1.11 cm) UNF - ¼" (0.64 cm) BSP, and ½" (1.27 cm) BSP (with metric models) |
| Weight Material | Hard, non-magnetic alloy (imperial units) Stainless steel (±;0.015% imperial and metric models) Aluminum (small incremental weight sets) |
| Engineering Units | kg/cm2, bar, kPa |
| Cases | Up to 4 (model and configuration dependent) |
| Dimensions | Pump: 31.3 x 9 x 20" (79.4 x 22.9 x 50.8 cm) Weights: 12 x 12 x 9" (30.5 x 30.5 x 22.9 cm) |
| Weight | Tester and case: 50 lbs (22.7 kg) Pump: 20 lbs (9.1 kg) Weights: 55 to 210 lbs (25 to 95.3 kg) (each case) |
Click on a category to view a selection of compatible accessories with the Ametek M&G Type T DM-TQ Series Hydraulic Deadweight Tester, kg/cm2, bar, and kPa configurations, dual-column dual-piston cylinder units.
| Pressure Range | Up to 1000 kg/cm2/1000 bar/100,000 kPa (model dependent) |
| Accuracy | ±;0.015% rdg |
| Increments | Low to minimum: 0.5 kg/cm"2, 0.5 bar, 50 kPa High to minimum: 5 kg/cm"2, 5 bar, 500 kPa Small: Small incremental weight sets available (optional sold separately) |
| Gravity | 980.665 gals (international standard) Local gravity available (specify when ordering) |
| Piston/Cylinders | Dual |
| Columns | Dual |
| Weight Sets | Single or dual (as ordered) |
| Pressure Source | Lever action Hand-actuated Dual volume hydraulic pump |
| Medium | Distilled water/alcohol mix (standard) or AAA oil (optional sold separately) (specify when ordering) |
| Reservoir Capacity | 75"3 (1.23 L) |
| Displacement | High range: 0.17 to 0.20"3 (2.8 to 3.2 cc) per stroke Low range: 0.018 to 0.024"3 (0.30 to 0.40 cc) per stroke |
| Wetted Surfaces | 300 series stainless steel, monel |
| O-Rings | Buna N (standard), EPT (optional sold separately), Viton (optional sold separately) (specify when ordering) |
| Test Connections | ¼" (0.64 cm) NPT, ½" (1.27 cm) NPT, 7⁄16" (1.11 cm) UNF - ¼" (0.64 cm) BSP, and ½" (1.27 cm) BSP (with metric models) |
| Weight Material | Hard, non-magnetic alloy (imperial units) Stainless steel (±;0.015% imperial and metric models) Aluminum (small incremental weight sets) |
| Engineering Units | kg/cm2, bar, kPa |
| Cases | Up to 4 (model and configuration dependent) |
| Dimensions | Pump: 31.3 x 9 x 20" (79.4 x 22.9 x 50.8 cm) Weights: 12 x 12 x 9" (30.5 x 30.5 x 22.9 cm) |
| Weight | Tester and case: 50 lbs (22.7 kg) Pump: 20 lbs (9.1 kg) Weights: 55 to 210 lbs (25 to 95.3 kg) (each case) |
Click on a category to view a selection of compatible accessories with the Ametek M&G Type T DM-TQ Series Hydraulic Deadweight Tester, kg/cm2, bar, and kPa configurations, dual-column dual-piston cylinder units.
