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Description
Our BARTON 199 differential pressure units (DPU) serve as drive units for a wide variety of instruments. All models have rupture-proof bellows.Each DPU consists of a bellows unit assembly (BUA) and removable pressure housings. Inside the BUA, the flexible bellows are secured to a central plate. In double-bellows models, the movable bellows are rigidly connected by a double Valve stem that passes through the central plate. The seats of Valve, in the passage of the central plate, form a seal with the Valves. When entering in contact with the stem of the Valve in the central plate is a drive arm pivoted at the end of a sealed torsion tube. The bellows is filled with a clean, non-corrosive and low-freezing point liquid. A range spring assembly provides tension against the applied pressures.
In operation, pressure is applied to both sides of the bellows. Any pressure difference causes the bellows to move until the spring effect (range springs) balances the force. The linear movement of the bellows (proportional to the DP) is transmitted as a rotary movement through the torsion tube.
In double-bellows units, if the bellows are subject to a DP greater than the DP rating of the unit, a Valve is closed and traps the filling fluid in the bellows, completely supporting the bellows and preventing breakage. As opposed Valves are used, complete protection is provided in any Address.
Download Datasheet - Diferential unit pressure
Download User manual - Differential pressure units
Download Datasheet - Diferential unit pressure
Download User manual - Differential pressure units
Specifications
Brand: BARTON
Housing / central plate: Forge steel AISI C1018
Safe working pressure: 2,000 PSI (138 bar) Max
Model 199 Differential pressure unit
The BARTON 199N NACE DPU is a 199 DPU specifically designed to meet the requirements of NACE for the HzS service. It can measure DP up to 2000 psi (138 bar) without damaging the unit due to overpressure. For DP up to 15 psi (1 bar), a 3-3 / 4 "diameter bellows is used, more than 15 psi (1 bar), a 2 1/8" diameter bellows is used. All other features and functions are the same as those of the standard M199 DPU.
