Kitz KE-2015-00 User manual

Document No.: KE-2015-00
Operation and Maintenance Manual
For
A-Type Damper
D-Type Damper
[Wafer Type]
Thank you for choosing KITZ products.
For safe and trouble-free function and performance of the product, make sure to read and
understand all items in this manual before installation and operation. Keep this manual
accessible to all operational personnel.

Document No.: KE-2015-00
This manual applies to the manual operation of the KITZ A-type and D-type dampers (wafer type).
For electric or pneumatic operation, refer to the operation manual prepared by the manufacturers of the
relevant actuators.
SAFETY PRECAUTIONS
For the safe use of the product, read all safety precautions in this manual before handling the product.
The safety precautions in this manual are determined to ensure safe and proper use of the product and to
prevent personal injury and property damage. This manual uses two terms, Warning and Caution,
according to the hazard level, to clearly indicate the extent and severity of the risk.
Both Warning and Caution indicate important safety instructions. Please be sure to follow them.
Indicates an imminently hazardous situation that, if not avoided, may
result in serious injury or death.
Indicates a potentially hazardous situation that, if not avoided, may result
in minor or moderate injury and product damage.
Indicates a prohibited action that must not be carried out.
Indicates a mandatory action that must be carried out.
NOTES TO USERS
 This manual is designed to show an appropriate usage of the products for transportation, storage,
installation, operation and maintenance. Be sure to read through this manual before handling the product.
 This manual does not cover the whole scope of conceivable usage of the products for transportation,
storage, installation, operation and maintenance. If technical assistance beyond the scope of this manual is
required, contact KITZ Corporation or its distributors.
 The specifications have been determined with safety consideration. Do not use products beyond the
specifications.
 The illustrations given in this manual do not show all the details. If more detailed information is required,
refer to our relevant assembly drawings.
*Any information provided in this operation manual is subject to change without prior notice.

Document No.: KE-2015-00
Contents
Ⅰ. Construction and Design Features ･･････････････････････1
Ⅱ. Operating Device ････････････････････････････････････8
Ⅲ. Transportation and Storage ･････････････････････････････11
Ⅳ. Installation ･･･････････････････････････････････････14
Ⅴ.Operation ･･････････････････････････････････････18
Ⅵ. Periodic Inspection ･･････････････････････････････････22
Ⅶ. Disassembly and Reassembly ･･･････････････････････････26

Document No.: KE-2015-00 1/34
Ⅰ. Construction and Design Features

Document No.: KE-2015-00 2/34
I. Construction and Design Features
1. Construction and Design Features
1.1 D-type damper
D-type damper has a metal disc and metal seat (hard chrome plating) to control the fluid flow. A
clearance is provided between the internal diameter of the body and the external diameter of
the disc so that it is suitable for flow regulation of high temperature fluids, powder-containing
fluids (metal or sand) or slurry. It also can be used as a damper for hoppers.
1.2 A-type damper
A-type damper has a slightly larger disc. The oval-shaped disc is designed to tilt and touch the
body interior (hard chrome plating) when the damper is in the closed position. A-type damper
can be used for the same purpose as D-type damper, but its leakage rate is lower. The rotation
angle of the disc is between 73°and 78°when the damper is in the closed position. Note that
A-type damper is not suitable for the flow control of powder-containing fluid.
(1) Do not forcibly operate the damper with metal or sand clogged inside. Such use
may damage the damper.
This illustration shows a typical construction.
Gland (C3604BE)
Packing (PTFE
impregnated asbestos
packing)
Stem (SUS403)
Body
(FC250＋Hcr)
Disc
(SUS430)

Document No.: KE-2015-00 3/34
I. Construction and Design Features
2. Specifications
2.1 Maximum service pressure ･････････････････････････････････ 0.49 MPa
2.2 Service temperature range ･･････････････････････････････････ 0℃ to ＋230℃
2.3 Shell test (Hydraulic pressure) ････････････････････････････ 1.96 MPa
2.4 Allowable leakage
10A ･･････････････････････････････････････････････････ Approx. 2 % of rated Cv value
10D ･･････････････････････････････････････････････････ Approx. 3 % of rated CV value
2.5 Applicable flange
JIS 5K/10K
2.6 Rotation angle
10A ･･････････････････････････････････････････････････ 73°to 78°
10D ･･････････････････････････････････････････････････ 90°

Document No.: KE-2015-00 4/34
I. Construction and Design Features
3.Flow Characteristics
3.1 A-type damper
[FlowCharacteristicCurve] [PressureLoss]
3.2 D-type damper
[FlowCharacteristicCurve] [PressureLoss]
Close Opening Degree (%) Open Flow rate [m3/h]
F
l
o
w
r
a
t
e
(
%
)
P
r
e
s
s
u
r
e
l
o
s
s
F
l
o
w
r
a
t
e
(
%
)
P
r
e
s
s
u
r
e
l
o
s
s
Close Opening Degree (%) Open Flow rate [m3/h]

Document No.: KE-2015-00 5/34
I. Construction and Design Features
4.Size and Number of Piping Bolts and Nuts (Bolts and nuts used except for cast iron flanges)
4.1 Hexagon head bolt: Hexagon bolt & nut
Flange JIS 5K JIS 10K
Bolt Hexagon Head Bolt Hexagon Head Bolt
Nominal Size Size L Number Size L Number
50 M12 90 4 M16 100 4
65 M12 100 4 M16 110 4
80 M16 110 4 M16 120 8
100 M16 120 8 M16 130 8
125 M16 130 8 M20 140 8
150 M16 140 8 M20 150 8
200 M20 150 8 M20 160 12
250 M20 170 12 M22 180 12
300 M20 180 12 M22 190 16
第Ⅰ編 構造と機能
Hexagon Head Bolt and Nut (L=mm)

Document No.: KE-2015-00 6/34
I. Construction and Design Features
4.2 Stud bolt and nut (L=mm)
Flange JIS 5K JIS 10K
Bolt Stud Bolt Stud Bolt
Nominal Size Size L Number Size L Number
50 M12 105 4 M16 120 4
65 M12 110 4 M16 125 4
80 M16 125 4 M16 130 8
100 M16 140 8 M16 140 8
125 M16 145 8 M20 160 8
150 M16 150 8 M20 170 8
200 M20 175 8 M20 180 12
250 M20 190 12 M22 200 12
300 M20 200 12 M22 210 16
Stud Bolt and Nut (L=mm)

Document No.: KE-2015-00 7/34
I. Construction and Design Features
5. Applicable Pipes
When the damper is in the fully open position, the disc enters the pipe and the disc may contacts
with the pipe. When the weld flange as shown below is used, select appropriate pipes. ● in the
table below shows the applicability.
Welding
Method Welding Method A Welding Method B
Schedule Schedule
Pipe Type SGP 20 40 SGP 20 40
50A 2B ● ● ● ● ● ●
65 2-1/2 ● ● ● ● ● ●
80 3 ● ● ● ● ● ●
100 4 ● ● ● ● ● ●
125 5 ● ● ● ● ● ●
150 6 ● ● ● ● ● ●
200 8 ● ● ● ● ● ●
250 10 ● ● ● ● ● ●
300 12 ● ● ● ● ● ●
Welding method
A B
Disc
Weld flange

Document No.: KE-2015-00 8/34
Ⅱ. Operating Device

Document No.: KE-2015-00 9/34
II. Operating Device
1. Lever Handle Type Operator
1.1 A lever handle is directly mounted on the damper.
1.2 The damper can be in the open position or in the closed position by turning the lever handle by
90 degrees counterclockwise or clockwise respectively.
Open
Close
Flow direction Flow direction

Document No.: KE-2015-00 10/34
II. Operating Device
2. Gear Operator
2.1 A gear operator can be mounted on the damper.
2.2 Damper is operated by turning the handwheel according to the indication, such as an arrow or
letters, namely rotating the handwheel clockwise to set the damper in the closed position or
counterclockwise to set the damper in the open position.
2.3 Handwheel operating torques vary with a number of factors, such as the opening position,
damper sizes and working pressures.
2.4 The gear operator is a device to transmit a large torque to the stem by converting the torque
from the drive shaft by means of the reduction gearing unit.
Open Close

Document No.: KE-2015-00 11/34
Ⅲ. Transportation and Storage

Document No.: KE-2015-00 12/34
Ⅲ. Transportation and Storage
1. Transportation
Precautions for transportation
(1) Keep off the lifting work area to prevent personal injury due to collapsing or
falling of cargo.
(1) Take care not to damage the painted surfaces of the products during
transportation. All damaged surfaces shall be properly repaired to prevent
corrosion.
(2) Take care when handling and storing carton-packaged products. High humidity
may damage the cartons and products.
1.2 Transportation
1.2.1 Keep the products in their original packaging condition during transportation and until just
before installation.
1.2.2 Do not give any extraordinary impact on the products by throwing, dropping, dragging, or
toppling them down.

Document No.: KE-2015-00 13/34
Ⅲ. Transportation and Storage
2. Storage
2.1 Precautions for storage
(1) Do not store the products in a corrosive environment. It may cause corrosion
on the threaded areas, leading to a malfunction of the product.
(2) Do not place any objects on the products, or do not step on them. Overloading
may damage the products.
(3) Do not pile up the products for storage. Unstable piling may damage the
products or cause personal injury.
2.2 Storage
2.2.1 Store the products in a dust-free, low humidity and well -ventilated indoor place.
2.2.2 Keep the products in their original packaging and place them on pallets or racks for storage.
Storing products directly on the ground or concrete floor shall be avoided.

Document No.: KE-2015-00 14/34
Ⅳ. Installation

Document No.: KE-2015-00 15/34
Ⅳ. Installation
1. Precautions for Installation
(1) Check the specifications with the nameplate or the relevant catalogue before
installation. Service pressure, fluid and temperature of the product are
determined by its trim materials, etc. Use of the product beyond the
specifications will lead to malfunctions of the product.
(1) Ensure secure footing for installation and operation.
(2) Provide adequate lighting for operation.
(3) Pipes shall be supported as required.
(4) Do not connect the damper directly with a check valve or a pump. It may
damage the disc by unwanted contact with the connected device.
1.1 Allow sufficient room for operation, installation, disassembly and subsequent maintenance work
with consideration for the damper size and the stem direction.
1.2 Take appropriate measures in a case when dampers are installed in a confined space.
1.3 Where possible, avoid installing the products in areas where external forces, such as vibrations,
hamper the functions of the products.

Document No.: KE-2015-00 16/34
Ⅳ. Installation
2. Precautions for Piping
(1) After flanges are welded with pipes, wait until the welding heat cools down
enough before installing a damper.
(2) Appropriately chamfer or round the edge of the welded flanges to prevent the
surfaces from being damaged.
(3) Before installation, clean the connecting pipes and remove any foreign objects,
such as sand, dust or welding spatters.
(4) Make sure that the flange surfaces have no damage or defects. Remove any
foreign objects from the flange surfaces.
(5) Align the upstream side and the downstream side accurately. Leakage from
flanged connections will be caused by inaccurate alignment.
Support pipes for correct alignment.

Document No.: KE-2015-00 17/34
Ⅳ. Installation
3. Installation Procedures
3.1 Set jack bolts, if needed, to adjust the space between the pipe flanges. The space between the
pipe flanges should be 6 to 10 mm wider than the face-to-face dimension of the damper.
3.2 Place the damper between the flanges. And
temporarily set two bolts into the lower side of the
pipe flanges and gaskets between the flanges. Then
temporarily set two bolts into the upper side of the
pipe flanges.
3.3 Temporarily tighten the four bolts and check that the
damper is installed in the correct position.
3.4 Check that the disc does not contact with the flange
when the damper is in the fully open position.
3.5 Attach all of the remaining bolts through the holes of
pipe flanges and tighten them.
3.6 Tighten the bolts evenly and alternatively in a star
pattern.
3.7 Bolts, nuts, and gaskets for piping are not supplied
with the damper. Please prepare appropriate bolts,
nuts, and gaskets in advance.
Damper
Gasket
Jack bolt
Bolt