The start and stop action of positive displacement pumps rapidly accelerates and decelerates fluid in motion resulting in pulsations observed as pressure spikes. Pulsation dampeners absorb the energy of these pressure spikes by accumulating and then releasing process fluid when the pump is on its suction stroke. By keeping the fluid in motion, dampeners eliminate vibration and the pulsing, inconsistent flow caused by pulsation.

Water hammer (or hydraulic shock) occurs when fluid in motion is suddenly started, stopped or forced to change direction. Quick closing valves, rapid pump startup/shutdown, even changes in the pipe profile, can cause an abrupt change in fluid velocity producing violent and sometimes catastrophic water hammer. Surge suppressors act as shock absorbers by accumulating and releasing process fluid as needed to slow the rate of fluid velocity change to a level low enough to prevent water hammer.

Dampener pre-charge pressure depends on the specific application, usage, and dampener model or type. Generally speaking, pulsation dampeners installed at the pump discharge are pre-charged to approximately 80% of expected mean system pressure. Once the pump is started to generate system pressure, the charge can be increased or decreased to optimize the dampening effect.

You can read more about pulsation dampeners and how they work on our blog.

The amount of pulsation absorbed by a dampener is a function of the dampener size to the pump stroke volume. An undersized dampener cannot absorb enough energy to adequately compensate for fluctuations in pressure and flow. An oversized dampener stores more fluid and can, in some cases, result in slow equalization and delayed response to system changes. Be sure to select the correct dampener for your application.

4IN³ SENTRY III

HOUSING MATERIALS: CPVC, Polypropylene, PVC, PVDF, Alloy 20, Hastelloy C, Stainless Steel, 30 RA Polished Stainless Steel
BLADDER MATERIALS: Buna-N, EPDM, Hypalon, Neoprene, PTFE, Santoprene, Silicone (Food Grade), Viton
INLET SIZES: 0.375" (10mm), 0.5" (15mm), 0.75" (20mm) Tri-clamp
INLET TYPES: FNPT, BSP, ANSI Flange, DN Flange, Socket Weld, Tri-Clamp, Union
PRESSURE RATINGS: 150 psi (10.3 bar), PVDF 200 psi (13.7 bar), 1000 psi (68.9 bar)
AIR CONTROLS: Adjustable, Chargeable, SS Chargeable (V Model)
CERTIFICATIONS & TESTING: ATEX, NSF, CRN, PED, ARRA, 3.1 Cert, Material Cert, Cert of Origin, Hydrostatic, Dye Penetrant, Radiography, PMI, Bolt Tensile, Customer Specified

HOUSING CONSTRUCTION

10IN³ SENTRY III

HOUSING MATERIALS: Acetal, CPVC, Polypropylene, PVC, PVDF, Alloy 20, Hastelloy C, Stainless Steel, 30 RA Polished Stainless Steel
BLADDER MATERIALS: Buna-N, EPDM, Hypalon, Neoprene, PTFE, Santoprene, Silicone (Food Grade), Viton
INLET SIZES: 0.375" (10mm), 0.5" (15mm), 0.75" (20mm) Tri-clamp
INLET TYPES: FNPT, BSP, ANSI Flange, DN Flange, Socket Weld, Tri-Clamp, Union
PRESSURE RATINGS: 150 psi (10.3 bar), PVDF 200 psi (13.7 bar), 1000 psi (68.9 bar)
AIR CONTROLS: Adjustable, Chargeable, SS Chargeable (V Model)
CERTIFICATIONS: ATEX, NSF, CRN, PED, ARRA, 3.1 Cert, Material Cert, Cert of Origin, Hydrostatic, Dye Penetrant, Radiography, PMI, Bolt Tensile, Customer Specified

HOUSING CONSTRUCTION

36IN³ SENTRY II

HOUSING MATERIALS: Acetal, CPVC, Polypropylene, PTFE, PVC, PVDF, Alloy 20, Carbon Steel, Hastelloy C, Stainless Steel, 30 RA Polished Stainless Steel
BLADDER MATERIALS: Aflas, Buna-N, Buna-N (Food Grade), EPDM, Hypalon, Neoprene, PTFE, Santoprene, Silicone (Food Grade), Viton
INLET SIZES: 0.5" (15mm), 0.75" (20mm), 1" (25mm), 1.5" (40mm) Tri-clamp
INLET TYPES: FNPT, BSP, ANSI Flange, DN Flange, Socket Weld, Tri-Clamp, Union
PRESSURE RATINGS: 150 psi (10.3 bar), 1000 psi (68.9 bar)
AIR CONTROLS: Adjustable, Automatic, Chargeable, SS Chargeable (V Model)
CERTIFICATIONS: ATEX, NSF, CRN, PED, ARRA, 3.1 Cert, Material Cert, Cert of Origin, Hydrostatic, Dye Penetrant, Radiography, PMI, Bolt Tensile, Customer Specified

HOUSING CONSTRUCTION

85IN³ SENTRY II

HOUSING MATERIALS: Acetal, Conductive Polypropylene, CPVC, Polypropylene, PTFE, PVC, PVDF, Alloy 20, Carbon Steel, Hastelloy C, Stainless Steel, 30 RA Polished Stainless Steel
BLADDER MATERIALS: Aflas, Buna-N, Buna-N (Food Grade), EPDM, Hypalon, Neoprene, PTFE, Santoprene, Silicone (Food Grade), Viton
INLET SIZES: 0.5" (15mm), 0.75" (20mm), 1" (25mm), 1.5" (40mm) Tri-clamp
INLET TYPES: FNPT, BSP, ANSI Flange, DN Flange, Socket Weld, Tri-Clamp, Union
PRESSURE RATINGS: 150 psi (10.3 bar), PVDF 250 psi (17.2 bar), 1000 psi (68.9 bar)
AIR CONTROLS: Adjustable, Automatic, Chargeable, SS Chargeable (V Model)
CERTIFICATIONS: ATEX, NSF, CRN, PED, ARRA, 3.1 Cert, Material Cert, Cert of Origin, Hydrostatic, Dye Penetrant, Radiography, PMI, Bolt Tensile, Customer Specified

HOUSING CONSTRUCTION

175IN³ SENTRY I

HOUSING MATERIALS: Polypropylene, PTFE, PVC, PVDF, Alloy 20, Hastelloy C, Stainless Steel, 30 RA Polished Stainless Steel
BLADDER MATERIALS: Aflas, Buna-N, EPDM, Hypalon, Neoprene, PTFE, Santoprene, Silicone (Food Grade), Viton
INLET SIZES: 1.5" (40mm), 2" (50mm), 2.5" (65mm) Tri-clamp
INLET TYPES: FNPT, BSP, ANSI Flange, DN Flange, Socket Weld, Tri-Clamp, Union
PRESSURE RATINGS: 150 psi (10.3 bar), 1000 psi (68.9 bar)
AIR CONTROLS: Adjustable, Automatic, Chargeable, SS Chargeable (V Model)
CERTIFICATIONS: ATEX, NSF, CRN, PED, ARRA, 3.1 Cert, Material Cert, Cert of Origin, Hydrostatic, Dye Penetrant, Radiography, PMI, Bolt Tensile, Customer Specified

HOUSING CONSTRUCTION

370IN³ SENTRY I

HOUSING MATERIALS: Polypropylene, PTFE, PVC, PVDF, Alloy 20, Hastelloy C, Stainless Steel, 30 RA Polished Stainless Steel
BLADDER MATERIALS: Aflas, Buna-N, EPDM, Hypalon, Neoprene, PTFE, Santoprene, Silicone (Food Grade), Viton, SS Metal Belows (Series 2420)
INLET SIZES: 1.5" (40mm), 2" (50mm), 2.5" (65mm) Tri-clamp
INLET TYPES: FNPT, BSP, ANSI Flange, DN Flange, Socket Weld, Tri-Clamp, Union
PRESSURE RATINGS: 150 psi (10.3 bar), PVDF 200 psi (13.7 bar), 1000 psi (68.9 bar)
AIR CONTROLS: Adjustable, Automatic, Chargeable, SS Chargeable (V Model)
CERTIFICATIONS: ATEX, NSF, CRN, PED, ARRA, 3.1 Cert, Material Cert, Cert of Origin, Hydrostatic, Dye Penetrant, Radiography, PMI, Bolt Tensile, Customer Specified

HOUSING CONSTRUCTION

1155IN³ SENTRY IV

HOUSING MATERIALS: Polypropylene, Aluminum, Epoxy Coated Aluminum, Alloy 20, Carbon Steel, Epoxy Coated Carbon Steel, Hastelloy C, Stainless Steel, 30 RA Polished Stainless Steel
BLADDER MATERIALS: Buna-N, EPDM, Hypalon, Neoprene, PTFE, Silicone (Food Grade), Viton
INLET SIZES: 3" (80mm), 4" (100mm), 6" (150mm)
INLET TYPES: FNPT, ANSI Flange, DN Flange, Tri-Clamp
PRESSURE RATINGS: 150 psi (10.3 bar), 275 psi (18.9 bar)
AIR CONTROLS: Adjustable, Automatic, Chargeable, SS Chargeable (V Model)
CERTIFICATIONS: ATEX, PED, ARRA, 3.1 Cert, Material Cert, Cert of Origin, Hydrostatic, Dye Penetrant, PMI, Bolt Tensile, Customer Specified

HOUSING CONSTRUCTION

2310IN³ SENTRY V

HOUSING MATERIALS: Carbon Steel, Epoxy Coated Carbon Steel, Stainless Steel
BLADDER MATERIALS: Buna-N, EPDM, Hypalon, Neoprene, Silicone (Food Grade), Viton
INLET SIZES: 3" (80mm), 4" (100mm), 6" (150mm)
INLET TYPES: FNPT, ANSI Flange, DN Flange
PRESSURE RATINGS: 275 psi (18.9 bar)
AIR CONTROLS: Adjustable, Automatic, Chargeable, SS Chargeable (V Model)
CERTIFICATIONS: ATEX, PED, ARRA, 3.1 Cert, Material Cert, Cert of Origin, Hydrostatic, Dye Penetrant, PMI, Bolt Tensile, Customer Specified

HOUSING CONSTRUCTION