are available from these manufacturers:

Hydac Corp. (Hycon Div.)

Dampeners

Pulsations and shocks in hydraulic lines can result in costly damage to the piping and other system components. Reciprocating piston pumps by design create pressure pulsations, vitrations, and noise in the system. HYDAC suction stabilizers, pulsation dampeners and silencers, when applied to piston pumps, will reduce pulsations and noise.
Furthermore, pressure pulsations can make control in servo systems nearly impossible without installing a pulsation dampener. Hydac shock absorbers can be applied to greatly reduce shock wave energy. These waves can be harmful to all components in your hydraulic system. Shock waves can be created by closing a valve in a high flow line, such as one found in a petroleum terminal. HYDAC makes five different types of dampeners. They are: Shock Absorber, Model SB 35 A; Suction Stabilizer, Model SB 16 S; Silencer (Hydraulic Noise Attenuator), Model SD 250/400; Pulsation Dampener - Bladder Accumulator Type, Model SB...P (PH); and Pulsation Dampener - Diaphragm Accumulator Type, Model SBO...P.

Model SB 35 A Shock Absorber

Nominal volume ranges from 25 to 120 gallons. Maximum working pressure ranges 275 to 500 psi.
Specifications and Options

Model SB 16 S Suction Stabilizer

Nominal volume ranges from 3 to 100 gallons. Maximum working pressure ranges up to 275 psi.
Specifications and Options

Model SD 250/400 Silencer (Hydraulic Noise Attenuator)

Maximum flow rate is 10 to 420 GPM. Maximum working pressure is 3000 to 5800 PSI.
Specifications and Options

Model SB...P (PH) Pulsation Dampener - Bladder Accumulator Type

Nominal volume is 1/4 to 10 gallons. Maximum working pressure ranges from 3000 to 14500 PSI.
Specifications and Options

Model SBO...P Pulsation Dampener - Diaphragm Accumulator Type

Nominal volume is 5 in³ to 120³. Maximum working pressure range is 1500 to 10000 psi.
Specifications and Options

Accumulator Accessories

A full range of accessories for the installation, service and maintenance of all accumulators completes HYDAC's line of accumulators. In addition to Safety and Shut-off Blocks, Mounting Components, Charging and Gauging Units, Permanent Gauging Blocks, Thermal Fuse Caps, Accumulator Sets, and Mobile and Portable Nitrogen Charging Units, special valve blocks and adapters are available for your particular requirements.

Safety and Shut-off Blocks

The safety and shut-off block is designed to protect, shut-off and discharge hydraulic accumulators or user units. The compact design simplifies the hydraulic system connection and offers the following advantages:
- minimum space compared to individual elements
- reduced installation time
- various system connections
- system lockout.

It incorporates these feature:
1 - pressure relief valve
2 - pressure gauge (optional)
3 - shut-off valve
4 - manual bleed valve
5 - 2-way solenoid operated bleed valve (optional)
In accordance with OSHA requirements for stored hazardous energy, HYDAC recommends the use of its safety and shut-off block (SAB) with solenoid operated bleed valve. Use of the HYDAC SAB block in your system satisfies OSHA regulation 29 CFR part 1910 for the accumulator.

CONSTRUCTION
The safety and shut-off block consists of a valve block, a built-in pressure relief valve, a main shut-off valve, and a manually operated bleed valve. In addition, an optional solenoid-operated bleed valve (open when de-energized, however, closed when de-energized is available upon request) allows automatic release of the accumulator or the user unit and therefore of the hydraulic system in an emergency or during shut-down. The necessary return line connection is provided in addition to the gauge connection.

CONNECTIONS
The safety and shut-off block has the following connections:
S - Accumulator connection
P - System connection
T - Tank connection
M1 - Gauge connection

TECHNICAL SPECIFICATIONS
Fluids
Mineral oil, hydraulic oil, water glycol, non-flammable fluids (other fluids upon request).
Temperature14 °F to 176 °F for carbon steel (-10 °C to +80 °C)
Maximum Working Pressure
Up to 5800 psi (400 bar)
Model with manually operated bleed valve
The basic model code "M" contains a manually operated bleed valve for manual pressure release of the accumulator. There are three models available.
Model with solenoid operated bleed valve
The "E" model Safety and Shut-off Block contains a solenoid operated bleed valve (open when de-energized, however, closed when de-energized is available upon request) for automatic pressure release of the accumulator. There are three models available.
Specifications and Options

Charging and Gauging Units

To maintain system performance, HYDAC recommends a regular check of the gas precharge pressure. A loss in the gas precharge pressure will cause a drop in the system efficiency and could cause damage to the bladder, diaphragm or piston accumulator.

By means of a charging and gauging unit, hydro-pneumatic accumulators are precharged with dry nitrogen or their existing gas precharge pressure is checked. For these purposes, a charging and gauging unit is connected to a commercially available nitrogen bottle via a flexible charging hose.

HYDAC offers two types of charging and gauging units, the FPS model, used with HYDAC gas valve version 4, except on top repairable bladder accumulators, and the FPK model used with HYDAC gas valve version 1. An adapter FPK/SB can be used with the FPK model in order to fit HYDAC gas valve version 4, including top repairable bladder accumulators. The charging and gauging units incorporate a gauge, check valve in the charging connection, manual bleed valve and T-handle.
Specifications and Options

Mounting Components

HYDAC mounting components are used to mount all types of hydro-pneumatic accumulators safely and simply, regardless of the mounting position. HYDAC's wide range includes suitable mounting components for every type of hydro-pneumatic accumulator.

COMPONENTS
Mounting components are used primarily for the following:
• to fix the accumulator into its position.
• to carry the weight of the accumulator.
• to counteract the forces exerted by the hydraulic lines.
They are constructed out of zinc-plated sheet steel, utilizing a rubber insert to absorb vibration.
HYDAC offers three styles of clamps: light (HSL), regular (HS) and heavy (HSS) duty. The light and regular duty have a one piece constuction with center adjustment.

Conversely, the heavy dity clamps have a two piece construction. This allows for easy installation and removal while improving the strength with center adjustment.
HYDAC also offers base brackets for larger accumulators for proper support and isolation from system vibrations. The brackets incorporate a rubber support ring for this reason. All mounting components can be easily bolted to your system. Application guides are provided to match mounting components with the appropriate HYDAC accumulator.
Specifications and Options

Permanent Gauging Units

Permanent gauging blocks have a 7/8" - 14 UNF port and have 5 different gauge pressure ranges available. The ranges are: 0 - 850 PSI, 0 - 1450 PSI, 0 - 2300 PSI, 0 - 3600 PSI, and 0 - 5800 PSI. There are two models that differ only in dimensions in order to accommodate different measurement situations.

Thermal Fuse Cap

Thermal fuse caps adapts to a 7/8" - 14 UNF port. It has a maximum working pressure of 5000 psi. Its maximum working temperature range is 0 to 200°F. Fusing temperature is 320 to 340°F.

Accumulator Sets

All the necessary hardware to mount an accumulator is provided. The hardware consists of a bend sheet steel back-plate with 4 mounting brackets for bolting or welding to any structure, one or two HS or HSS clamps in zinc plated sheet steel with rubber insert, rubber support ring and a base bracket (KBK) bolted to the sheet steel back-plate. There are 5 sizes available: 1, 2.5, 5, 10 and 15 gallon sets for bladder accumulator (SB 330). Sets to accommodate SB 35 shock absorbers and SB 600 bladder accumulators are available. Consult the Flo-Products sales staff.

Set Type	Acc. Size in Gals.	Base Bracket		Clamp
Set Type	Acc. Size in Gals.	Type	Qty.	Type	Qty.
SEB 4	1	KBK 167/G	1	HS 167	1
SEB 10 SEB 20 SEB 32 SEB 54	2.5 5 10 15	KBK 222/G	1	HSS 222/229	1 1 2 2

Accumulator Set Specifications
Set Type	Dimensions in inches
	Back-Plate Height	Back-Plate Width	Set Depth	Mtg Hole Vert.	Mtg Hole Horiz.	Tank Cntrln fm Back	KBK Height	Strap 1 fm Bottom	Strap 2 fm Bottom
SEB 4	16.14	10.63	10.59	12.60	12.99	5.91	3.74	-	10.63
SEB 10	22.44	10.63	11.89	16.54	12.99	7.13	4.37	-	12.99
SEB 20								-	19.69
SEB 32 SEB 54	52.76			46.85				19.69	45.67