Applications

● Steel expansion and contraction of bridges water-stop
● Bridge wall height blocking to the joint water
● The median strip of the bridge to the joint water stop
● Building and multistory parking lot on deck concrete seam stop
● Waterproofing of the structure

Features

● U-shaped, the stress generated at the time of expansion and contraction can be alleviated. More over, retention is also possible.
● Abundant in number of types, it can cope with various installation gaps and expansion / contraction amount.
● The width of the mounting part is compact, it is easy to apply to various gapped dimensions. In addition, leakage prevention material is installed in the mounting part, it is possible to stop water completely.
● By removing the mounting nut, it can easily be replaced.
● In addition to perpendicular direction, it can correspond to movement in diagonal direction.
● The reinforcement type embeds a high strength breaker inside, so it has outstanding durability.
● Even in cold climates, there are materials with good trackability.
● The standard color is black, but color processing can be done.

Installation reference example

● Steel expansion and contraction unit <General section>
● Steel expansion and contraction device <End part>
In case
● Wall height column part
● Vertical joint	● Median strip	● Slab concrete seam

Geometry

Standard type				Reinforcement type
				In case
type	Allowable expansion / contraction amount (mm)	Bellows lid	Dimension table (mm)
			A	B	C	D	E	R
YN – 80	– 40 to + 40	S	120	40	40	30	17	20
YN-100	– 50 to + 50	S	130	50	40	30	17	25
YN-160	– 80 to + 80	M	160	80	40	50	17	40
YN-200	-100 to +100	M	200	100	50	50	22	50
YN-300	-150 to + 150	L	250	150	50	50	22	75
YN-400	-200 to + 200	L	320	200	60	100	27	100
YN-500	-250 to +250	L	370	250	60	100	27	125
YN-600	-300 to + 300	LL	560	440	60	50	27	220

The RD coupling is a rubber attachment that connects the large and small reservoir with a piping system.

Function

Low drainage and piping system to avoid leakage and flooding
RD couplings are fitted into the gap between the tank and the pipe.

Durability of RD couplings

Although the RD couplings are made entirely of natural rubber, the joints still have the following limitations:
Rubber degradation due to prolonged sun exposure
Oxidized by heat and steam from generators
Gases such as SOx, NOx, HCl, etc. also cause rubber to get corroded

Material Standard

Ozone test
JIS K 6259 Test Method
Ozone Test Method The electrolyte constant method
Concentrations = 50 ± 5 pphm
Temperature = 40 ± 2 ° C
Elongation = 20% static
Time = 24 hours
Standard value No Criss

Design

Dimensional Table

Part Name and Material

Translated LF Type Parts And Materials Table

Precautions during installation:
Upon shipment, the total product length (L) is set to the standard surface dimension (at 20°C).
When using it horizontally, adjust the total length (L) to match the conditions at the time of installation and the surface dimensions. (For adjustments, please use the adjust bolts.)
After installation is complete, please remove the adjust bolts (including the brackets).

LF-2, 4 Type Dimensional Table

E-1, 2, 3, 4 Type Dimensional Table

The post Meiko Engineering JA Expansion Joint first appeared on Kouei Japan Trading | Get Quotation.]]> https://koueitrading.com/global/product/meiko-engineering-jr-expansion-joint/ Wed, 29 Aug 2018 02:29:41 +0000 https://koueitrading.com/global/?post_type=product&p=2810 Product Made in Japan Manufacturer: MEIKO ENGINEERING Model: JR Diameter (⌀) Type Extension (mm) Compression (mm) Bending Angle (°) Standard Offset (mm) Offset During Earthquake (mm) ⌀50 JR 25 25 45 ±25 ±50 ⌀75 50 50 45 ±30 ±60 ⌀100 65 65 45 ±40 ±80 ⌀125 75 75 45 ±50 ±100 Diameter (⌀) Type Pipe […]

RX Type Dimensional Table

Components And Material Table

Performance Specifications Table

Đối với 050-275-0100/125, xem loại JA ở trang 9.
Tên sản phẩm, vật liệu và tiêu chuẩn hoạt động dựa trên P3 và P45.

Clasification

It is “φ 200 A type” attached to the Hanshin Expressway No. 15 Sakai line in 1979, Hanshin University.
Even now after the earthquake, its function still works well. (Taken in March 2000)

Under the high temperature from the atmosphere and the local climate as well as the high vibration from various means of transportation, it is really hard for pipes to tolerate all of these.

That is the reason why MEC joint is developed to protect pipes from such troubles.

This is a vibration isolation / elastic rubber joint for a closed system.
And we have several different types of expansion joint ranging from φ50 to φ550, such as round-angular type, rectangular type, PVC, FRP, steel pipes etc.

Main function

◎ MEC joints have enough strength to connect two pipes together. However, you should set up the pipe appropriately according to the standard value because if not, the elastic rubber will easily come off from the original place.
◎ In terms of flange type products, tighten the bolts sequentially in the diagonal direction so that the bolts are not tightened one by one.
Please tighten it 3 times until you feel tight enough.
Tightening strength is generally controlled by a torque meter.
Tightening torque is to evaluate the standard value of the packing maker manufacturer.
If it does not match this standard value, leakage may occur or PVC can be damaged.
◎ When there is the congealed waters in the drain pipe due to heavy rain etc., the elastic rubber joint may fall off, or the pipe might break down.

Material Standard

Test method: … JIS K 6259
Ozone test condition … Constant current electrolysis method
Concentration = 50 ± 5 pphm
Temperature = 40 ± 2 ° C
Elongation = 20% Static
Time = 24 hrs
Test results …… Kiretsunashi

Cold resistance

As rubber gets cooler, it gets hard and brittle because it was made from a type of polymer with natural rubber. So you need no worry because it can stretch under the very low temperature.
Low temperature operating temperature range of various polymers

Part name and material

Performance standard

Common types

• R type
• WR type
• RX type
• JR type
• JA type
• PF type
• JD type
• JE type
• LF type
• NW type
• Inner joint 200A
• RD Joint

Application

JIS Standard

For Manhole of Bridge.

FLUOROCARBON RUBBER

V-100 (JIS : HFH75468)

NEOPRENE RUBBER