Roten Type 2 o ring replacement

Temperature -40℃ to +200℃
Speed ≤15m/s
Pressurey ≤1Mpa
Material Q2.U2,B,V1,P,E,V,F,G

Type:O-Ring Mechanical Seal

Replacement:Burgmann BT-RN,AES T03,Vulcan 12,Roten 2,Flowserve 42,Latty, T900, Roten 2

Temperature:-40℃ to +200℃




The BT-RN represents the traditionally designed robust 

pusher seal. This type of mechanical seal is easy to install 

and covers a wide range of applications; its reliability has 

been proven by millions of units in worldwide operation. 

It is a convenient solution for the widest range of 

applications: for clean water as well as chemical media.


• Single pusher-type seal

• Unbalanced

• Conical spring

• Dependent on direction of rotation

Operating range

Shaft diameter: 

RN, RN3, RN6: d1 = 6…110mm (0.24"…4.33"),

RN.NU, RN3.NU: d1 = 10…100mm (0.39"…3.94"), 

RN4: upon request

Pressure: p1* = 12 bar (174 PSI)

Temperature: t* = -35 °C…+180 °C (-31 °F…+356 °F)

Sliding velocity: vg = 15m/s (49 ft/s)

* Dependent on medium, size and material


Seal face: CrNi steel (F, F1), CrNiMo steel (G), 

Tungsten carbide (U)

Seat: Carbon graphite antimony impregnated (A), 

Carbon graphite resin impregnated (B), 

Tungsten carbide (U)

Elastomers: NBR (P), EPDM (E), FKM (V), FFKM (K)

Metalparts: CrNisteel 1.4301 (F), CrNiMo steel 1.4401 (G)

Recommended applications

• Chemical industry

• Building services industry

• Centrifugal pumps

• Clean water pumps



• W270





• DM 174/04

Item Description

1 Seal face

2 Stationary seat

3, 3a O-Ring

4 Spring

Seat ring of alternative seats can be supplied with short tail or with pin to block the seat and prevent seat rotation. The products we made match to related standard such as KTW, W270, ACS, WRAS, NSF, FDA and DM 174/04. Bt-rn series stands for the rugged push rod seal of traditional design. This type of mechanical seal is easy to install and has a wide range of applications; its reliability has been proved by the operation of millions of units around the world. It is a convenient solution for the widest range of applications: clean water and chemical media. It also is featured of Single pusher-type seal, Unbalanced, Conical spring and Dependent on direction of rotation.

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