DIFFUSERS 12 JULY 2015 PUBLICATION Features - Omni directional, swirl effect discharge. - Horizontal or vertical projection. - High induction effect. - Perforated square, perforated circular or open face circular design. - Standard or clip-in ceiling border options. - Manual or automatic adjustment. SERIES GSJ Adjustable Swirl Diffusers (Patented)
16
Embed
GSJ 2015 GSJ NEW Doc - Air Distribution Products, Natural ...
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
DIFFUSERS 12
JULY 2015
PUBLICATION
Features- Omni directional, swirl effect discharge.
- Horizontal or vertical projection.
- High induction effect.
- Perforated square, perforated circular or openface circular design.
- Standard or clip-in ceiling border options.
- Manual or automatic adjustment.
SERIES GSJAdjustable Swirl Diffusers(Patented)
2
SERIES GSJAdjustable Swirl Diffusers
Introduction
Options
Complementing the GSF range of fixed Swirl Diffusers withthe GSJ Series Gilberts introduce a modern and attractivelystyled range of adjustable Swirl Diffusers suitable for amultitude of ceiling supply applications. As with the fixed Swirl the circular pattern of radial vanesfeatured on this unit provide the rotating air distribution effecttypically associated with this type of diffuser. This allows theunit to introduce high volumes of air into the conditionedspace, taking advantage of its rapid entrainment andintermixing characteristics. As a result the unit can deliver high room air change rates ascompared to conventional diffusers. Moreover with theinterlinked blades all fully adjustable the unit can provideeither horizontal or vertical projection by simple manual orautomatic adjustment. Notwithstanding the performance potential, aestheticaspects have also been considered. The circular profile of
the GSJA type unit lends itself well to exposed ductwork andother contemporary applications but is arguably lessappropriate in square ceiling grids. The GSJB and GSJCtype however, which offer a perforated face diffuser typeappearance, lend themselves particularly well in theseinstances always enabling a good balance betweenperformance and aesthetics to be maintained for allapplications. Newer models, such as the GSJD, adapted forclip-in ceiling type applications and the GSJE with a circularperforated face add further dimensions to swirl diffuserselection and application.
Available in 160, 250, 315, 450 and 630mm diameter the adjustable Swirl range comprises of 5 style options:
TYPE GSJA Standard Swirl Diffuser comprising of linked adjustable blades mounted in a circular housing frame.
TYPE GSJB Circular Swirl Diffuser with linked adjustable blades fitted into a square, perforated face, housing frame with 32mm flanges. The perforated fascia is hinged for easy access from the diffuser face.
TYPE GSJC Circular Swirl Diffuser with linked adjustable blades fitted into a borderless, perforatedface plate.
TYPE GSJD Circular Swirl Diffuser with linked adjustable blades fitted into a square, perforatedfascia, adapted for clip-in ceiling applications.
TYPE GSJE Circular Swirl Diffuser with linked adjustable blades fitted into a circular, perforatedfascia with removable core (630 dia. unit not available).
For extract applications complementary Exhaust Swirl Units GSXB, GSXC, and GSXE are available to match supplydiffuser type options.
A key feature on adjustable Swirl Diffusers is the ability to move from horizontal to vertical projection on demand. With GSJSeries this can be achieved in 4 ways.
MANUALThis type of manually adjustable diffuser allows variablecontrol of the supply air jet by rotation of the central boss.The rotation of the central boss is converted by connectingmechanisms to re-position the swirl diffuser control vanes.
THERMALThis control option utilises an internal and integral wax filledcylinder. The cylinder automatically expands and adjusts theair distribution vanes dependant upon supply airtemperatures, thus delivering warm air in a vertical and coolair in a horizontal direction. Initial warm up of spaces istherefore quick and efficient with draughts being avoidedduring isothermal and cooling conditions. The mainadvantage of this control option is that it requires no externalconnection to any control system and is therefore completelyselfcontained. Vertical projection is adjustable betweenapproximately 18°C and 25°C by means of a central controlscrew. Below these values the control vanes progressivelymove to distribute the supply air in a horizontal direction.Direction of the supply air is therefore dependant uponsupply air temperature. A supply air maximum temperatureof 50°C should not be exceeded.
Features- Omni directional, swirl effect discharge.
- Horizontal or vertical projection.
- High induction effect.
- Perforated square, perforated circular or openface circular design.
- Standard or clip-in ceiling border options.
- Manual or automatic adjustment.
3
Selection Procedure
Performance Data
Options ELECTRIC
In this type of diffuser the adjustment of the supply air jet is
controlled by means of a integral electric motor.
The motor is two position and as such, can move the air
control vanes from vertical to horizontal and back in a direct
operation. Units are supplied with a 24v AC/DC Belimo
motor.
PNEUMATIC
A pneumatic cylinder is utilised in this model to control the
operation of the air control vanes from vertical to horizontal
and back in a direct operation. Pneumatic cylinders have two
compressed air supply connection ports for operation
in both directions. Units can therefore control the direction of
the supply air jet via an external pneumatic control system.
Compressed air pressure of 1 Bar required to operate unit.
Maximum pressure 1.5 Bar.
The performance tables that are illustrated in this brochure
give tabulated performance data for each listed size of
diffuser, together with their design. The figures given relate
to Cooling, Ventilation and Heating applications and are
given for both horizontal and vertical distribution of
conditioned air.
References Used
PRESSURE: All pressures are in Pa N/m2
THROW: The horizontal and vertical
distances for air streams are given
at both 0.5 and 0.25 m/s terminal
velocities and are based upon a
ceiling effect for horizontal
distribution and free field for vertical
distribution.
SOUND: The NC values are peak values on
the NC curves
The performance data for all Gilberts products is derived
using a Gilberts plenum design and specification.
Performance cannot be guaranteed where alternative
FixingStandard fixing for all units is external via drop rods
(by others) to 20 x 9mm elongated slots in 25 x 25mm
angle cleats at the rear.
Alternatively an internal fixing can be specified to take
drop rods inside the plenum box.
FinishStandard Finish:
Standard finish for all units is a PPC
White RAL 9010 20% gloss.Note: Internals finished Matt Black on GSJB and
GSJC types.
Special Finish:
PPC to stock BS or RAL colour.
Gilberts (Blackpool) Ltd reserve the right to alter the specification without notice. For our latest product data please visit www.gilbertsblackpool.com.The information