Type JZ – Low leakage

For low-leakage shut-off in air conditioning systems

 

Rectangular multileaf dampers for volume flow and pressure control as well as for low-leakage shut-off of ducts and openings in walls and ceiling slabs

  • Maximum dimensions of steel and stainless steel variants: 2000 × 1995 mm; of aluminium variant: 1200 × 1050 mm
  • Closed blade air leakage to EN 1751, classes 1 – 4, depending on variant
  • Casing air leakage to EN 1751, class C
  • Aerofoil opposed action blades
  • Closed cell side seals meet increased hygiene requirements
  • Steel and stainless steel variants: blades interconnected by external linkage
  • Aluminium variant: blades interconnected by gears
  • Available in standard sizes and many intermediate sizes


Optional equipment and accessories

  • Actuators: Open/Close actuators, modulating actuators
  • Explosion-proof construction with pneumatic actuator or spring return actuator (not for JZ-*L-AL)
  • Powder-coated construction
  • Aluminium variant also as anodised construction
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  • Application
  • Description

Application

  • Multileaf dampers of Type JZ-Low leakage are used as an acting element in the volume flow and pressure control in air conditioning systems
  • For low-leakage shut-off of ducts and openings in walls and ceiling slabs
  • Stainless steel and powder-coated constructions with increased corrosion resistance if required
  • Steel and stainless steel variants with brass or stainless steel bearings are suitable for use in potentially explosive atmospheres (ATEX)

Special characteristics

  • Aerofoil blades
  • Low-maintenance, robust construction
  • No parts with silicone
  • Available in standard sizes and many intermediate sizes
  • Closed cell side seals meet increased hygiene requirements

Variants

  • JZ-LL: Multileaf damper with opposed blade action, made of galvanised sheet steel, to EN 1751, classes 3 – 4
  • JZ-HL: Multileaf damper with opposed blade action, made of galvanised sheet steel, to EN 1751, classes 1 – 2
  • JZ-LL-A2: Multileaf damper with opposed blade action, made of stainless steel, to EN 1751, classes 3 – 4
  • JZ-LL-AL: Multileaf damper with opposed blade action, made of aluminium, to EN 1751, class 4
  • JZ-HL-AL: Multileaf damper with opposed blade action, made of aluminium, to EN 1751, class 2

Attachments

  • Quadrant stays and limit switches: Quadrant stays to adjust the damper blades (stepless adjustment) and for capturing the end positions
  • Open/Close actuators: Actuators for opening and closing multileaf dampers
  • Modulating actuators: Actuators for stepless blade adjustment
  • Pneumatic actuators: Pneumatic actuators for opening and closing multileaf dampers
  • Explosion-proof actuators: Actuators for opening and closing multileaf dampers installed in potentially explosive atmospheres

Accessories

  • Installation subframe: Installation subframe for the fast and simple installation of multileaf dampers

Technical information

  • Function
  • Technical data
  • Quick sizing
  • Specification text
  • Order code
  • Related products

Functional description

Linkage

Low-leakage multileaf dampers with external linkage have opposed action blades.

An external linkage transfers the synchronous rotational movement from the drive arm to the individual blades. Even very large multileaf dampers can be safely opened and closed with this type of linkage.

Opposed action blades close at different speeds since the linkage includes a transverse link. This facilitates the closing process and reduces the closed blade air leakage.


Gears

Multileaf dampers with gears can only have opposed action blades.

The internal gears transfer the synchronous rotational movement from the drive arm to the individual blades.

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Rectangular multileaf dampers for volume flow and pressure control as well as for low-leakage shut-off of ducts and openings in walls and ceiling slabs.

Suitable for duct pressures up to 1000 Pa.

Ready-to-operate unit which consists of the casing, aerofoil blades and the blade mechanism.

Flanges on both sides, suitable for duct connection.

The blade position is indicated externally by a notch in the blade shaft extension.

Closed blade air leakage to EN 1751, class 4.

Casing air leakage to EN 1751, class C.

Special characteristics

  • Aerofoil blades
  • Low-maintenance, robust construction
  • No parts with silicone
  • Available in standard sizes and many intermediate sizes
  • Closed cell side seals meet increased hygiene requirements

Technical data

  • Nominal sizes: 200 × 100 mm – 2000 × 1995 mm
  • Differential pressure range: 5 – 3500 Pa
  • Operating temperature: 0 to 100 °C
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Contact

Thank you for your message!

Visual contact Visual contact

Your message is send and will be processed shortly.
Our department for Service-Requests will contact you asap.
For general question regarding products or services you can also call:
Tel.: +43 1 250 43-0| Fax: +43 1 250 43 34