Application

Machine highlights

Technical parameters

Extrusion process

Production reference

Wear parts

Muyang MY series Single-screw Extruder is suitable for both the sinking and

floating aquafeed production.

It is also widely used for pet food production.

As for other applications in new fields, please consult Muyang technical

experts.

Application

Protruding-end pellet

Widened

Extrusion

Capability

Application

Flat-end pellet Oil-rich pellet (17%)

Varied in shape and color

Small pellet (Φ 1.0 mm)

Application

Technical parameters

Extrusion process

Production reference

Wear parts

Machine highlights

Structure highlights

Anti-bridge feeder

Conditioner

Extrusion parts

Water and steam pipeline system

Cutter device

Control system

Support bracket

Conditioner

Principal machine

Cutter device

MY single-screw extruder

Ensure smooth and precise feeding

Anti-bridge feeder

Anti-bridge design;

Batch type automatic feeding;

Gravimeter for flow detection

and variable-frequency motor

for flow control together with

the computer, make up a

closed-loop circle for feeding

control.

Feeding accuracy is 0.1kg.

Anti-bridge feeder

MaterialFlow control

Computer

Flow settings

Feedback

Flow detection

Filling level ： 0% Filling level ： 40% Filling level ： 60%

Optimal paddle configuration

to increase material filling level,

prolong conditioning time and

improve gelatinization of

product, which finally

contributes to high capacity of

extrusion production.

SCTZ Conditioner (DDC)

Gelatinization (%) & Conditioning time (s)

Ge

latin

izatio

n

％

Conditioning time (sec.)

Steam Water

Steam

Combining a one-cylinder conditioner with a DDC conditioner, the SPTZ complex

conditioner can improve not only the extrusion capacity but also the quality of

extrudates.

SPTZ Complex Conditioner

Conditioner configured to single-screw extruder

No. Model SCTZ Conditioner (DDC)SPTZ Complex Conditioner

1 MY-135 SCTZ 28

2 MY-165 SPTZ 33

3 MY-215 SPTZ 39

4 MY-265 SPTZ 45

0 30 60 90 120 150 180 210 240

60

50

40

30

20

10

gela

tiniza

tion

％

conditioning time (sec.)

Note: Fresh water fish formulation, conditioner temperature 98 , conditioning water 24%. ℃

Complex

conditioner

DDC conditioner

Gelatinization can be around 15% higher

Comparison of gelatinization

L/D=13.1 to increase material retention time in the extruder;

Combining the shearing effects of both screw and shear lock to increase

extrusion efficiency and pellet uniformity;

New material applied in the manufacturing of wear parts, which prolongs the

service life by 2-3 times and ensure stable production.

Principal machine

Steam and water pipeline system

Steam to extruder chamfer

Steam impurity drainage

Water to

jacket

Steam to jacket

Water drainage

condensate drainage

New cutter device to ensure long time stable running;

A gap usually is generated between cutting knives and the die plate after long time running

and wearing. And it should be eliminated in order to obtain good appearance extrudates;

The new cutter device applied can eliminate the gap during production without down-time.

Cutter device

Hand wheel

Cutter Motor Positionin

g lock

Muyang automatic control system

can simplify operation and

eliminate the impact of manual

operation;

All production data could be

recorded for production

management;

Advanced European control

elements applied to ensure

precise and reliable control;

Available of three control modes:

manual, commissioning and

automatic.

Control system

Single-screw VS. Twin-screw (1)Item Single-screw

extruderTwin-screw extruder Remarks

Conveying manner

Feed mash is convoyed forward by friction and stickiness

Feed mash is forced to slid forward

Single-screw extruder conveys material mainly by friction, resulting in relatively high wearing and power consumption.

Granular of finished pellet

>1.5 mm >1.5mm<1.5 mm

The product of single-screw extruder is limited because of the non-uniform distributed heat and kneading effect.

Ingredient adaptability

Common( limited by moisture content and fat content of ingredients)

Wider (incl. ingredient rich of moisture and fat)

Single-screw extruder can not adapt to the ingredients that of small friction .

Max. fat% ≤10% ＞ 17%(could be up to 25%) Fat helps to reduce friction.

Max. H2O% 10% ～ 30% 5% ～ 95% Moisture helps to reduce friction.

Heat distribution of feed mash

Common Uniform 　

Steam flashing performance

Common Excellent 　

Shearing force when extruding

Strong Common Single screw extruder is of larger backward pressure and shearing force.

Single-screw VS. Twin-screw (2)

Item Single-screw extruder Twin-screw extruder Remarks

Backflow phenomenon

Common Rare Gap between screw and chamber wall of single-screw extruder is larger.

Pressure on die Non-uniform and will affect capacity

Uniform Material in single-screw extruder is liable to flow back.

Product quality, safety and variety

Good in quality and safety, but the variety is limited

Excellent in quality and safety with a wide variety

Twin-screw extruder is of uniform mechanical and thermal effect as well as high moisture content.

Running Stable and occasional blockage

Stable and reliable

Operation Required good experience

Ease of operation and control

Production pressure of single-screw extruder is more sensitive to the formula.

Production Efficiency

Common High Twin-screw of good conveying and extruding efficiency.

Power consumption Relatively high Relatively low Twin-screw of good conveying and extruding efficiency.

Machine price Relatively cheap Relatively expensive Twin-screw is more complicate in construction.

Capacity Common Relatively high

Application

Machine highlights

Extrusion process

Production reference

Wear parts

Technical parameters

No. Model Main motor （ kW ）

Screw dia.(mm)

Pet food（ kg/h ）

Floating aquafeed（ kg/h ）

Sinking aquafeed（ kg/h ）

1 MY-135 90 135 1600~2500 1600~2500 500~1500

2 MY-165110

1652000~3500 2000~3500 2000~3000

160 3000~6000 3000~6000 2000~4000

3 MY-215

250

215

6000~9000 6000~9000 3000~6000

315 8000~12000 8000~12000 3000~6000

4 MY-265 400 265 10000~15000 10000~15000 5500~12000

Capacity of MY series Single-screw Extruders

Capacity & die opening area

Floating aquafeed:

Die opening area (mm2)

Capacity(t/h)=——————————————

200~250mm2/t · h

Sinking aquafeed:

Die opening area (mm2)

Capacity(t/h)=——————————————

550~600mm2/t · h

Process parameter control for floating aquafeed production

Parameters Single-screw extruder

Temperature prior to die discharging 125-135 ℃

Moisture prior to die discharging 25-27%

Bulk density after discharge 320~440kg/m3

Moisture of extruded product21-24%

(Flash by 3-4%)

Pressure of discharging barrel 34-37 atmos

Floating-sinking knee point 480kg/m3

Process parameter control for sinking aquafeed production

Parameters Single-screw extruder

Conditioning moisture 19-23%

Conditioning temperature 80℃

Bulk density after discharge 490~550kg/m3

Moisture of extruded product 22-27%

Pressure of discharging barrel 20-29 atmos

Final gelatinization 90-95%

Requirements to formulation

Materials Floating feed Sinking feed

Starch ≥ 20% ≥ 10%

Oil ≤ 5% 4%~12%

Fat ≤ 17% (single-screw) _____

Extrusion coefficient 1.8 1.1-1.3

Note that the feed formulation should not contain too much animal protein,

especially that for floating aquafeed.

Die hold dia.Φ （ mm ） Max. granular of ground material （ mm ）1.0 0.1

1.5 0.15

2.0 0.3

2.5 0.5

3.0 0.8

4.0 1.0

5.0 1.2

>5.0 1.2

Requirements to formulation

For aquafeed production, the granular of ground material usually should be controlled at

20 mesh (0.85mm), for the production with die hole smaller than 1.5mm, make sure at least

98% material could pass through the 60 mesh sieve.

Fiber in the formulation should be clean away in time to ensure smooth operation,

especially for the production of small aquafeed.

1. Environment temperature for normal use is within -10 ～ +40 ;℃

2. Relative moisture content for normal use is within 30~85%;

3. Altitude for normal use is lower than 1000 m;

4. Keep the room where extruder working clean and ventilated;

5. Keep the extruder far away from corrosive gas, explosive gas and steam;

6.Power supply ： refer to motor nameplate ； air pressure ≧ 0.6Mpa;

7.Keep enough space around the extruder for easy operation, repair and maintenance;

8.Make sure the machine is level.

9.The vibration should not exceed12 mm·s-1

Requirements to working condition

Under other working conditions, please consult Muyang technical experts.

Application

Machine highlights

Technical parameters

Production reference

Wear part

Extrusion process

After extrusion, drying, coating, cooling and grading, the finished product of expanded

aquafeed is featured by controllable density, wide raw material adaptability, good water

stability and high feed conversion ratio.

See Fig.1~Fig.4, the four common aquafeed extrusion processes. Those shown in

Fig1. and Fig.2 are recommended.

Extrusion process

No. Item

Extruder

MY135 MY165E MY215 MY215 MY265

1 Main power (kW) 90 160 250 315 400

2 Aquafeed capacity (t/h) 1.5 ～ 2.0 3.0 ～ 6 6.0 ～ 8.0 6.0 ～ 11.0 10.0 ～ 15.0

3Steam

aspiration system

Fan T40No4 N=1.5Kw

n=2900rpm

5-48-12NoN=3Kw

n=2900rpm

Cyclone / X55-Φ700

Airlock / GFZY-6

Air pipe dia.(mm)

Branch pipe dia. Φ150mm;Manifold pipe dia. Φ200mm

Branch pipe dia. Φ200mm;Manifold pipe dia. Φ250mm

4Belt conveyor (high

temperature resistance, 80 ～ 90℃, free of oil)

TDSG40 TDSG50

5 Dryer MGLZ22/ SKGW150-4 SKGD2000-5 SKGD2000-6 SKGD2000-8 SKGD2400-8

6Steam

exhaust system

Induced-draft fan

5-48-12NoN=7.5kw

n=2900rpm

4-72- No N=18.5Kwn=1800rpm

4-79- No N=22Kw

n=1800rpm

4-79- No N=30Kw

n=1600rpm

4-68NoN=55Kw

n=1000rpm

Cyclone X55-Φ1000 X55-Φ1800 X55-Φ2000 X55-Φ2400 X55-Φ2200x2

Airlock GFZY-8 GFZY-10

Air pipe dia.(mm)

Φ340 Φ400+Φ480/Φ600 Φ480/Φ700 Φ610/Φ800 Φ800/Φ1000

Process configuration

7Elevator (high

temperature resistance belt, 80 ～ 100℃)

TDTGq36/23 TDTGq40/23 TDTGq40/28 TDTGq50/28TDTGq50/

32

8 Grading sifter SFJH80X SFJH110x SFJH130x SFJH140x SFJH153x9 Volume of coating bin 1 （ m3） 3 （ m3） 4 （ m3） 6 （ m3）10 Continuous liquid coater SYPL SYPL SYPL SYPL SYPL11 Vacuum liquid coater SYPZ90 SYPZ120 SYPZ150 SYPZ200

12 Airlock SLNF16x

(SLNF14x(QD))SLNF22x

(SLNF19x(QD))SLNF24x SLNF28x SLNF32x

13

Aspirat

ion system

for cooling

Fan 5-48-12NoN=7.5kw

n=2900rpm

4-72Ⅱ NoN=15kw

n=2900rpm

4-7Ⅱ NoN=18.5kw

n=2900rpm

4-72N=30kw

n=1800rpm

4-68N=37kw

n=1800rpm

Cyclone X55-Φ1000 X55-Φ1400 X55-Φ1600 X55-Φ1800

X55-Φ2400X55-

1600x2Airlock GFZY-8 GFZY-10

Are pipe dia.(mm)

Φ340 Φ530 Φ610 Φ700 Φ800

14 Grading surge hopper Effective volume equal to that of mixer effective volume

15 Ultra-fine grading sifter SXFQ60 （ with 40 mesh screen, capacity up to 3t/h ） SXFQ60 （ with 40 mesh screen, capacity up to 5t/h ）

16Bagging machine （ belt

feeder type ） LCS-50-BZ

Note: ①Equip an air-draft hood for the aspiration system over the outlet of extruder ; ② A movable chute, which serves as a by-pass for conveying

product between extruder and conveyor, should be equipped. The belt conveyor is reversed; ③circulating air system for drying should be equipped

according to the operation manual; ④ There should have a straight chute over the dryer with at least 500mm to ensure feeding efficiency.

Process configuration for pneumatic conveying

Application

Machine highlights

Technical parameters

Production reference

Wear parts

Pelleting process

Currently, there are over 100 sets of Muyang MY series single-screw extruder

stably running in China and around the world. Satisfied customers include CP Group,

DaChan Food, Gold Coin, New Hope Group, Tongwei Group, etc.

Production reference

…………

Application

Machine highlights

Technical parameters

Production reference

Wear parts

Process configuration

Extruding rotor

For MY series single-screw

extruder, the screws, pressing locks

and kneading locks of extruding rotor

are all wear parts.

Usually, the operating life of the

extruding screw is about 12,000 tons.

Extruding rotor

Screw

Pressing lock Kneading lock

Extruding chamber

Fixed shear lock

Wear part

Note ： For MY series single-screw extruder, all liners (6

sections) for extruding barrel and wear rings in fixed shear locks

are wear parts.

liner of discharge chamber

Liner of feeding

chamber

Liner of pressure-relief chamber

Liner of middle section chamber

Discharge assembly

Die plate assembly

Die plate

Die plate holder Distributing cone

Cutter support bracket

Fixed holder

Pressure regulated ring

Venturi element

Cutter structure

Among above parts, cutting knife is wear part.

Cutter motor

Cutter shaft

Knife carrier

Knife holder

Cutting knife

Reducing motor: SEW, NORD, FLENDER, FALK…

Pneumatic/Hydraulic components: FESTO, SMC, YSC, Spirax Sarco …

Bearing: SKF, NSK, HWL…

Electric components: Honeywell, Omron, Schneider, Schmersal …

Wear parts from Muyang supplier

……

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