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Lightweight and excellent against the effects of corrosion and chemicals


1-Product Description


GRP manhole covers which are made from composite material such as glass fiber, resin, and quartz so on.


GRP Manhole cover is lightweight and excellent protection against corrosion and the effects of chemicals because it is made from FRP (fiber reinforced plastic).


It weighs only one seventh of the weight of an average cast iron cover. Because this cover is lightweight, it is easy to remove it during maintenance.

2-Products have the following special advantages:

1. Strictly manufactured according to ISO 9001: 2000 and EN124
2. High load capacity (Max. 40Ton)
3. Contain no metal, no scrap value
4. Long service life (Min. 30 years)
5. Well sealed, no noise pollution or rebound
6. Good wear and corrosion resistance, never rust
7. Special Relief Sculpture on Surface with good decorative effect
8. Perfect design and rich colors individually against various needs and requirements.


3-Types of manhole covers against its shape:
1. Circular Cover
2. Square Cover
3. Circular cover with Square outside.

4-Grades of load capacity:
1. A12 tons
2. B24 tons
3. C36 tons

4. D40 tons  




Shape                                               diameter                    weight kg

----------------------------                ---------------    ---------------     

Square(light)                                  600x600                               40

(Normal weight)                     600x600                               45

(Heavy)                                    600x600                               46


round(light)                                    600                                        22

(Normal weight)                     600                                        22

(Heavy)                                    600                                        39


(Light)                                       700                                        30

(Normal weight)                     700                                        30

(Heavy)                                    700                                        39


(Light)                                       800                                        45

(Normal weight)                            800                                        48

(Heavy)                                           800                                        50


7-Machine and Equipment List:


( to produce 600mm round well manhole cover and loop )


Equipment list


Name of equipment   BMC METHOD                    Qty                


Glass fiber draw bench                                   1pc             

Glass fiber filament cutter                               1pc                                

High speed stirring apparatus                           1pc             

Double Z shape high bonding stirring apparatus   1pc             

Hydrolic press                                               1pcs               

Manhole cover mold (light)                              1set         

                 (Normal)                                    1set            

                 (Heavy)                                      1set            

Manhole loop mold (light)                                1set                 

                (Normal)                                     1set            

                (Heavy)                                       1set            


8-Technical specification of machine and equipment:


A. Hydrolic press

   Working desk                                   : 1250x1200mm 

   Plug excursion                                  : 800mm

   Max distance                                    : 1200mm

   Bottom Cylinder capacity                    : 63mt

   Bottom cylinder excursion                   : 300mm



B. Glass fibre drawbench

   Measurement                          : 1200mmx890mmx1240mm

   Weight                                   : 300kg

   Filament drawing length            : 3000mm

   Filament drawing speed            : 0.06mm/second

   Drawing capacity                     : 0.75mt























C. Glass fibre filament cutter

   Measurement                          : 900mmx800mmx1070mm

   Weight                                   : 200kg

   Filament cutting length              : 0.09m—0.21m

   Filament cutting speed              : V=346.7times/minute

   Turn moment of force              :T=21.5N.m



D. high speed stirring apparatus - DISSOLVER TYPE

   Weigh                                    : 800kg

   Motor capacity                        : 5.5/7.5(KW/HP)

   Rise/drop height                      : 700mm

   Main axis speed                       : 125-1250r/minute

   Plate diameter                        : 250




E. Double Z shape high bonding stirring apparatus

  Raw material bracket block                  : 600mmx720mmx630mm,

  Capacity                                 : 70kg

  Stirring impeller                        : diameter 320x60   angle: 45  double

  Speed                                              : 32r/minute

  Motor                                              : Y132M1-7 4KW

  Turning part                                      : DWPA60-60

  Turning time                                     : 4 second

  Triangle tape                                     : A2795X4             

  Measurement                                    : 1375mmx1200mmx1120mm