Key Features

• Roten Type 5 Equivalent: A heavy-duty, single-spring rubber mechanical seal designed to replace Roten Type 5 and similar "Face-to-Face" standard seals.

• Compact Working Length: Face to face mechanical seal are engineered with a short axial length to fit pumps with limited stuffing box space, common in European centrifugal pumps (Calpeda, Lowara).

• Self-Aligning: The elastomer bellow allows the rotary face to self-align with the stationary seat, accommodating shaft end-play and misalignment.

• Torque Transmission: The coil spring grabs the shaft (interference fit) to drive the seal, ensuring positive rotation without slipping.

• Bi-Directional: Unlike some spring seals, the friction drive design allows this seal to operate in either direction of shaft rotation.

Product Specifications

Workshop

Product Research, Development and Testing

Our Product R&D and Testing focuses on optimizing face to face mechanical seal performance through advanced simulation and material analysis. Every rubber mechanical seal undergoes rigorous trials, including thermal cycling and pressure tests, to ensure durability, minimal leakage, and long service life in demanding industrial environments such as HVAC circulation, domestic water booster sets and light chemical transfer systems.

Industry Solutions

FAQs

Q: What does "Face to Face" mean here?

A: In this context, it refers to the seal's mating pair—the rotary face and the stationary face. This product includes both as a matched set, ready to install.

Q: Which Roten types and pump brands do rubber face-to-face seals replace?

A: They are drop-in OEM-interchangeable replacements for Roten Type 2, 2a and 5 configurations—cross-referenced as AES M37G and N47—on Calpeda, Ebara, Pedrollo and other Italian end-suction water pumps. The symmetric face-to-face layout removes handedness, so one rubber mechanical seal fits both clockwise and counter-clockwise rotation without swapping parts.

Q: How does the "face to face" design work, and why use rubber secondary seals?

A: A face to face mechanical seal mounts both rotating and stationary carbon faces in direct opposition, driven by a single coil spring with friction torque transfer. NBR, EPDM or FKM O-rings on both sides act as the secondary seal, absorbing shaft runout and thermal growth while resisting chlorinated water, mild acids and cleaning chemicals—outperforming leather or PTFE in HVAC and booster duty.

Q: What pressure, temperature and leakage limits can these rubber Roten replacements handle?

A: Validated in our R&D trials (thermal cycling + pressure soak), the rubber Roten replacement holds leakage below 0.1 ml/h at up to 12 bar and –20 to 120°C, with shaft speeds to 10 m/s and sizes 10–65 mm.