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Roller External Concrete Form Vibrator

Roller Concrete Form Vibrator

 

DHFR on a water tank form.
DHFR vibrator on a water tank form.

The Denver DHFR series of pneumatic Roller Vibrators have been the traditional go-to vibrator in the precast industry for decades.  Their high-force and high-frequency output makes them well suited for a wide range of industries.  Applications such as wet cast concrete, dry cast concrete, refractory placement, vibratory screeds, moving material in bins and hoppers and the unloading of railcars all benefit from the use of roller style vibrators.  When used with the weld-on cradle lug bracket, they are the ideal wall vibrator; especially walls that my contain large aggregate or are greater than 12 inches thick.

The DHFR roller vibrators are light enough to be portable, easy to handle and quickly installed.    In operation, air pressure activates the dual rollers and creates multiple vibrations during each cycle.   Motorless and bearingless with only a few moving parts, they are virtually maintenance-free.  The DHFR vibrator's bulletproof construction makes them well suited for a long  life of heavy duty service.   And, with the availability of a variety of brackets and accessories, the Denver dual roller series is one of the most versatile vibrators on the market.  

*Vibrator and bracket sold separately.

Need help selecting the right vibrator?  Please contact us by phone at 800.392.6703 or by email and let us help you choose the correct vibrator for your application.

Roller Vibrator Performance Data

30 PSI60 PSI90 PSI
Vibrator ModelVIbrator
Weight (Lbs)		Minimum
Hose
I.D.		Vibrations
Per Minute		Air
Consumption
(CFM)		Force Output
(Lbs)		Vibrations
Per Minute		Air
Consumption
(CFM)		Force Output
(Lbs)		Vibrations
Per Minute		Air
Consumption
(CFM)		Force Output (Lbs)
DHFR 4400
161/2"6,000399609,000602.10011,000683,200
DHFR 5500373/4"5,000301,7007,000493,5009,000585,700
DHFR 6500403/4"3,500321,8005,000443,7007,000527,100
DHFR 7800383/4"2.000351,6003,000464,2005,500518,100

See also Sizing and Using Form Vibrators and Turbine Form Vibrators

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Piston Vibrators

Piston Vibrators
Railcar Piston Vibrator
Piston vibrator aiding in the unloading of a railcar.

Air powered Piston Vibrators are one of the earliest styles of vibrators created for industrial applications and are still the best solution for many flow problems today.  They are versatile and well suited for many types of materials and applications.  Bins and hopper containing damp materials, large aggregates, dry powdery materials, sand and grains all respond well to the localized, linear action of a piston vibrator.  You will also find the piston vibrators on mobile applications such as: dump trucks and spreaders, railcar unloading, match plate and shakeout molds.  Pistons units typically have the lowest air consumption any pneumatic vibrator.  Their efficiency makes them the preferred air vibrator on applications where supply is limited.  With a durable ductile iron housing and only one moving part, they are very low maintenance.  When properly installed, they will provide many years of trouble free service.

Available in impacting or air cushioned styles.   With an impacting model, the piston actually makes contact with the base of the vibrator housing.  The impacting style provides the maximum amount of force.  An air cushioned (or silent) style of vibrator uses a cushion of air to prevent the piston making contact with the housing.  Air cushioned vibrators are quieter than the impacting style but they also produce less force and have a lower frequency.

Optional Features

Timed-impacting units available.  While the standard impacting unit will have thousands of vibrations per minute (vpm); a timed-impacting model can be set up to  produce from 1 to 120 vpm.  The timed-impacting models are better suited for applications where high frequency vibrators may cause the material to compact or where only intermittent vibration is needed.

Denver’s piston vibrators are also available with an optional threaded exhaust port.  Threaded exhaust ports allow to use of mufflers or allows for piping to removing the exhaust from protected areas.  Also, the vibrator can be used underwater by installing exhaust hoses from the vibrator to a location above surface.

All railcar units come with a universal wedge mount bracket designed to fit the dovetail brackets common on hopper cars.

Optional Teflon coated is available for highly abrasive or corrosive applications.

Need help selecting the right vibrator?  Please contact us by phone at 800.392.6703 or by email and let us help you choose the correct vibrator for your application.

Piston Vibrator Sizing Chart

Model Hopper
Capacity		Bin Wall
Thickness
DBH-1 0 -3 cubic feet1/16" to 1/8"
DBH-1.25 3 - 7 cubic feet1/16" to 1/8"
DBH-1.5 7 - 20 cubic feet3/16" to 1/4"
DBH-2 20 - 50 cubic feet3/16" to 1/4"
DBH-3 5 - 20 tons1/4" to 3/8"

Piston Vibrator Performance Data - Impacting Models

Model Piston
Diameter		Vibrations per Minute
(at 50 psi)
Weight
Sound
(dbA)		Air Use at
50 PSI
DBH-1 I1.0"72503 lbs873.3 cfm
DBH-1.25 I1.25"52508 lbs914.2 cfm
DBH-1.5 I1.5"510018 lbs1027.5 cfm
DBH-2 I2.0"475020 lbs1068.3 cfm
DBH-3 I3.0"340050 lbs9611.6 cfm

Piston Vibrator Performance Data - Air Cushioned Models

Model Piston
Diameter		Vibrations per Minute
(at 50 psi)
Weight
Sound
(dbA)		Air Use at
50 PSI
DBH-1 S1.0"36003 lbs753.3 cfm
DBH-1.25 S1.25"31508 lbs714.2 cfm
DBH-1.5 S1.625"220018 lbs677.5 cfm
DBH-2 S2.0"210020 lbs738.3 cfm
DBH-3 S3.0"180050 lbs7611.6 cfm
DRR-3 S
(Railcar Unit)		3.0"180076 lbsN/A11.6 cfm

 

See also Ball Vibrator and DOT Turbine Vibrator.

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Hand Held Plate Vibrator

Plate Vibrator for Insulated Concrete Forms (ICF)

Plate Vibrator for ICF

The Denver Vibrator HHPV plate for vibrator for ICF is a hand held vibration system that is well suited for use on a wide range of applications.  Built for the job site, the rugged and dependable HHPV is engineered for a long life of trouble-free service.   Ideal for insulated concrete forms, placing safety warning tiles in wet concrete, cast in place concrete counter tops and more.

 

Features:

  • Lightweight and easy to move at just 22 lbs.
  • Plate dimensions are 29" long by 13.5" wide.
  • Easy to use, maintenance-free design.
  • Rated for continuous duty at maximum force.
  • Force output can be adjusted to 4 different settings.
  • Double isolated handles reduces vibration and user fatigue.
  • Beveled edges for easier sliding across surfaces.
  • Available with a single-phase, 115-volt (standard) or 230-volt motor.
  • No assembly required.  Just plug-in and go.

Uses:

  • Vibrating concrete in insulated concrete forms (ICF).
  • Assisting in the installation of Tactile Warning Tiles in wet concrete.
  • Light consolidation on thin cast walls.
  • Manufacturing paver stones.
  • Poured-in-place concrete counter tops.
  • Wherever portable, light vibration is needed.
Other tips for proper consolidation with ICF.
  • Use properly mixed concrete with at least 6 inches of slump.
  • Using a pumper truck and a reducing hose can reduce splatter and increase efficiency.
  • Brace corners and lintels well and vibrate them thoroughly.
  • Use proper consolidation techniques and allow the ICF vibrator time to do its job.
  • Keep the vibrator firmly against the form and move gradually from one location to the next.
  • An operator who has experience using ICF vibrators usually provides better and more consistent results.

See also Low Force Head for ICF.

All products produced by Denver Concrete Vibrator come with a limited lifetime warranty against manufacturing defects.

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Flexible Shaft Concrete Vibrators

Flex Shaft Concrete Vibrator

Flex Shaft Concrete Vibrators

UL Concrete VibratorFlexible shaft concrete vibrators are designed for all general construction. Typical applications include footings and stem walls, small slabs, driveways, and stairways.  They are very portable and convenient to use.

Quick Release for Flexible shaft applications: Simple, effective and easy to use, the quick release package includes single-pin locking nose on the motor and an adapter for the flexible shaft housing. It allows quick removal of the core and housing assembly for storage or a change to a different shaft length or head size. The quick release system can easily be retrofitted to Denver Concrete Vibrator flexible shaft units that use the traditional threaded style connection. The Quick Release option package includes a new motor end, and one shaft adapter. Additional shaft adapters are available.

Backpack for flexible shaft concrete vibrators: This comfortable cushioned fiberglass frame moves the flexible shaft motor out of a man's hand and on to his back. It also serves to help keep equipment cleaner, and off the ground.

Insulated heads for epoxy coated rebar applications:  Available for jobs that require a cushioned head to protect the epoxy rebar, we offer 2.25", 2.5" and 3.0" diameter insulated heads for our flexible shaft vibrators.

EH25 concrete vibrator motor with truck on top.
Jobsite Tough.

Features:

  • High amplitude heads for greater radius of effect.
  • All shafts made to order. We can make the flex shaft any length.
  • The finest quality flexible housing available.
  • Sealed bearings require no lubrication.
  • Nine head sizes available for a wide variety of jobs .
  • A ball bearing coupler is available to connect two shafts together to may a single longer shaft.
  • Standard diameter flexible shafts are interchangeable with any of the six larger head sizes.
  • Interchangeable steel/rubber nose on the five larger heads. Core and housing, with head sizes of 1.5" diameter or larger, can be reversed, head end to motor end, to extend housing and core life.
  • All Denver Concrete Vibrators come with a limited lifetime warranty against manufacturing defects.

Learn how to properly use internal concrete vibrators here. (en español)

Also see Gas Backpack Vibrator and Flex-Power 5.

Need help selecting the right vibrator?  Please contact us by phone at 800.392.6703 or by email and let us help you choose the correct vibrator for your application.

Flex Shaft Electric Motor Options

ModelVoltageAmpsHPRPM**Weight (Lbs)
ES101159.01.012,00015
EM1511511.01.512,00015
EH25115/230*15/7.52.512,00024

*EH25 is available in either 115 or 230 volt.  It is not a dual voltage motor. 

**RPM varies with shaft length and head size.

Flex Shaft Head Performance Data

Model Head DiameterHead LengthHead WeightDiameter of Effect*Vibrations per
Minute		Centrifugal
Force		1/2 Wave
Amplitude
D.81-6
13/16"6"1 lbs3" to 7"12,00061 lbs0.024"
D.8113/16"11"1 lbs5" to 11"
12,000141 lbs0.03"
D1.251.25"8"2 lbs10" to 15"12,000178 lbs0.035"
D1.51.5"13"5 lbs12" to 18"10,000435 lbs0.045"
D1.751.75"15"7 lbs14" to 21"10,000830 lbs0.05"
D2.02.0"10"6 lbs16" to 24"10,000900 lbs0.055"
D2.52.5"10"9 lbs20" to 30"10,0001,260 lbs0.055"
D2.75 Spud2.75"6"7 lbs14" to 21"12,000818 lbs0.035"
D3.03.0"12"15 lbs24" to 36"10,0001,676 lbs0.039"

*The diameter of effect varies with wetness of the pour. The lower number is based upon a 2 to 4 inch slump.

Motor, Shaft and Head Pairing Recommendations.

Motor Size1.0 HP1.5 HP2.5 HP
Head SizeRecommended Maximum Shaft Length
13/16"20 ft.20 ft.30 ft.
1.25"16 ft.16 ft.30 ft.
1.5"10 ft.16 ft.30 ft.
1.75"-14 ft.28 ft.
2. 0"-12 ft.25 ft.
2.5"-10 ft.22 ft.
2.75" Spud10 ft.16 ft.28 ft.
3.0"--14 ft.

Flex Shaft Care and Use

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High Cycle Concrete Vibrators

High Cycle Concrete Vibrator with 2" Head

High Cycle Concrete Vibrators

Biloxi Bridge High Cycle Concrete Vibrator
High Cycle Vibrator on a Bridge Deck.

Denver Concrete Vibrator offers a full range of High Cycle vibrators available in head sizes of 1.75", 2.0", 2.5" and 3.0"  Running at a constant speed of 10,800 vibrations per minute regardless of the length of handling hose, these vibrators are ideal for low-slump concrete or tall columns and walls.  The 180 Hz frequency maximizes the efficiency of the three-phase low induction electric motor located within the vibrator head.  The High Cycle vibrator's area of  effect in low slump concrete is superior for large concrete placement jobs.

High Cycle Vibrators are recommended for general heavy construction, such as bridges, walls, locks and dams,  roadways and more.

High Cycle
High Cycle Sectional Connection

Our High Cycle vibrators are made to order and are available with a handling hose in lengths from 2 feet to 100 feet**.  Denver also offers a Sectional High Cycle vibrator that allows you to add or remove sections of handling hose to adjust the lengths of your vibrator.  In addition, the Sectional High Cycle allows you to quickly and easily switch heads to fine tune your vibrator to the requirements of you application.

Insulated heads for epoxy coated rebar applications: 
Only Denver Vibrator offers you the choice 3 different head sizes with rubber coating for epoxy-coated rebar.  Our 1.75", 2.0" and 2.5" heads can be rubber coated allowing you to choose the best option for your project.

Features:

  • Highest force output in the industry.
  • Available with a steel (standard) or rubber nose.
  • Rubber coating available to protect epoxy rebar.
  • Rigid handle available for horizontal insertion.
  • O-ring sealed to keep out moisture.
  • Large capacity dual eccentric bearings.
  • Large motor bearings for longer bearing life.
  • Easy to service using standard tools.
  • Wearable components made of hardened steel for long life.
  • Tail Cord lengths are available in a 25 foot (standard) and optional 50 or 100 foot.
  • All Denver Concrete Vibrators come with a limited lifetime warranty against manufacturing defects.

Also see High Cycle Generator Gas, Diesel and Electric

Learn how to properly use internal concrete vibrators here. (en español)

Need help selecting the right vibrator?  Please contact us by phone at 800.392.6703 or by email and let us help you choose the correct vibrator for your application.

High-Cycle Vibrator Performance Data

Model Head DiameterHead LengthHead WeightDiameter of Effect*Vibrations per
Minute		Centrifugal
Force		1/2 Wave
Amplitude
HC134
1.75"20"11 lbs14" to 21"10,800810 lbs0.045"
HC2002.0"20"13 lbs16" to 24"
10,800888 lbs0.05"
HC2502.5"21"20 lbs20" to 30"10,8001,690 lbs0.053"
HC3003.0"21"23 lbs24" to 42"10,8001,950 lbs0.051"

*The diameter of effect varies with wetness of the pour. The lower number is based upon a 2 to 4 inch slump.

**Custom fabrications are not returnable for refund or credit.

See also RG60 Vibrator

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Pneumatic Concrete Vibrators

Pneumatic Air Concrete Vibrator
Pneumatic Concrete Vibrators
Available in a Variety of Head Sizes

Performing at the specifications required by U.S. Government entities such as the Army Corps of Engineers, Denver’s line of pneumatic concrete vibrators are ideal for mass concrete pours where continuous operation is required.  Powered by compressed air, their simple motor-in-head construction eliminates heat issues by keeping the head cool while their bearingless design make the vibrators virtually maintenance-free.  Hard hitting and engineered for a long life, Denver’s pneumatic series of concrete vibrators are well suited for locks and dams, spillways, structural bearing walls, piers, roller-compacted concrete applications and more.

Pneumatic Air Concrete Vibrators on Gang Mount
A300 air concrete vibrators with steel handles on a gang mount.

The A250, A300, A350 and A450 models are available with a rubber handling hose in lengths from 4 feet to 100 feet. The A300, A350 and A450 models are also available with a 2 foot long steel handle. The A600S is available with a steel handle only. The steel handle models may be used to the depth of the exhaust ports (approximately 3 feet). Denver also offers the A250, A300 and A350 with rubber-coated heads for use with epoxy-coated rebar. Please note that the rubber coating will add a ½ inch to the head diameter listed below. All pneumatic concrete vibrators come with an inline oiler, throttle valve, air strainer and quick connect fitting. The steel handle models will include a 10 foot tail hose.

Maximum air pressure for the air vibrators is 90 psi.    For the best results and longest vibrator life, do not exceed 90 psi air pressure.  

Learn how to properly use internal concrete vibrators here. (en español)

All products made by Denver Concrete Vibrator come with a limited lifetime warranty against manufacturing defects.

Need help selecting the right vibrator?  Please contact us by phone at 800.392.6703 or by email and let us help you choose the correct vibrator for your application.

Pneumatic Vibrator Performance Data

Model Head DiameterHead LengthHead WeightDiameter of Effect*Vibrations per
Minute		Centrifugal
Force		1/2 Wave
Amplitude		Air Use at
90 PSI (Max)
A250
2.5"10"8 lbs20" to 30"10,000736 lbs0.04"60 cfm
A3003.0"13"15 lbs24" to 36"
9,0001,294 lbs0.06"110 cfm
A3503.5"13"20 lbs29" to 42"9,0001,830 lbs0.045"115 cfm
A4504.75"17"39 lbs38" to 54"8,0002,454 lbs0.04"175 cfm
A600S6.2"19"60 lbs50" to 72"7,0003,380 lbs0.045"190 cfm

*The diameter of effect varies with wetness of the pour. The lower number is based upon a 2 to 4 inch slump.

See also: Parts List for Air Vibrators.

 

 

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Backpack Concrete Vibrator

Backpack concrete vibrator / cement vibrator rebuild.

Backpack concrete vibrators are designed for general construction projects. Although a Denver Concrete backpack vibrator is capable for powering a flex shaft in excess of 20 feet in length, they are typically used with shafts in the 6 foot to 10 foot range.  Common applications include footings and stem walls, decks, driveways, and stairways.  The powerful Honda™ engine provides consistent performance even when driving our largest (3.0″ diameter) head in stiff concrete.

Features: 

  • Lightweight fiberglass frame with multi-point adjustment straps for maximum comfort.
  • Vented padding maximizes airflow to help keep the operator cool.
  • Extremely reliable Honda 4-cycle gas engine.
  • All metal parts used on high-stress transmission components.
  • Throttle actuated kill switch allows the engine to be shut off without removing the backpack.
  • Flex shaft quick disconnect system comes as standard equipment.
  • Convenient water bottle holder on the waist strap.
  • A hinged mount allows the engine to pivot for added comfort.
  • Low oil shut off system to prevent engine damage.
  • Weighs only 29 pounds.

Learn how to properly use internal concrete vibrators here. (en español)

Also see Electric Motor Flex Shaft Vibrators and Flex-Power 5.

All Denver Concrete Vibrators come with a limited lifetime warranty against manufacturing defects.

Need help selecting the right vibrator?  Please contact us by phone at 800.392.6703 or by email and let us help you choose the correct vibrator for your application.

Flex Shaft Head Performance Data

Model Head DiameterHead LengthHead WeightDiameter of Effect*Vibrations per
Minute		Centrifugal
Force		1/2 Wave
Amplitude
D.81-6
13/16"6"1 lbs3" to 7"12,00061 lbs0.024"
D.8113/16"11"1 lbs5" to 11"
12,000141 lbs0.03"
D1.251.25"8"2 lbs10" to 15"12,000178 lbs0.035"
D1.51.5"13"5 lbs12" to 18"10,000435 lbs0.045"
D1.751.75"15"7 lbs14" to 21"10,000830 lbs0.05"
D2.02.0"10"6 lbs16" to 24"10,000900 lbs0.055"
D2.52.5"10"9 lbs20" to 30"10,0001,260 lbs0.055"
D2.75 Spud2.75"6"7 lbs14" to 21"12,000818 lbs0.035"
D3.03.0"12"15 lbs24" to 36"10,0001,676 lbs0.039"

*The diameter of effect varies with wetness of the pour. The lower number is based upon a 2 to 4 inch slump.

Backpack Concrete Vibrator Parts List.