Sealing Solutions
Harrison Markfield supplies the complete range of Sealtek mechanical seals and sealing devices. Browse our full product catalogue below.
Patented Sleeveless Cartridge Seals
Style 600 SL
Revolutionary sleeveless cartridge seal with conical stuffing box design. First cartridge seal to eliminate the need for a shaft sleeve, greatly improving seal life in slurry and dirty fluid applications.
Style 600 DM/NMT
A more efficient and effective alternative to exotic alloys such as Super Duplex or Hastelloy C276, drastically outperforming traditional materials with this revolutionary non-metallic design.
Style 600 HD
A more robust design of the original sleeveless seal. Large driving pins and anti-rotation pins ensure greater torque resistance, with multiple springs for enhanced performance.
Style 600 MN
Sleeveless cartridge seal designed to fit and operate in Moyno/Mono Series 2000 positive displacement pumps, where available space would normally prevent standard cartridge seal installation.
Style 600 MT
Sleeveless seal integrated inside a Metso horizontal slurry pump stuffing box. Heavy duty arrangement available for increased resistance to particularly dense fluids.
Style 600 WR
Compact conical design that integrates inside Warman slurry pumps, incorporated in its own stuffing box and installed directly on the pump housing.
Style 606 DFS
New concept in double cartridge seals which makes the best use of the technology developed for the Style 600SL, widening its applications and performance capabilities.
Style 688 SPLIT
Split mechanical seal keeping all the features and benefits of the Style 600SL, with a conical extension of the stuffing box and hassle-free refurbishment procedure.
Split Mechanical Seals
Style 688 SPLIT
Designed to improve upon the current state of split mechanical seal technology. Features an open conical seal chamber and pressure-tested factory assembly, eliminating dust and dirt contamination of seal faces.
Patented Hybrid Seals
Style 907
Groundbreaking hybrid technology combining the advantages of mechanical seals and stuffing boxes while eliminating their disadvantages. Easy to install cartridge unit with low friction components and injectable self-lubricating sealing compound.
Style 907HT
High temperature version loaded with graphite fibers, equipped with bronze wear parts and graphite gaskets to withstand temperatures up to 450°C with peak resistance of over 500°C.
Style 907TD
Zero leakage design replacing wear rings with high performance lip seals. The spring-loaded gland follower allows visual control over the sealing compound level for easy monitoring.
Modular Cartridge Seals System
Style 670
Compact single cartridge seal with a very compact gland enabling installation on pumps with minimal available room. No modifications or measurements necessary for installation.
Style 677 RG
High performance in both clean liquids and slurry. Simplified design gives great reliability and durability. Versatile, adaptable, with quick and precise installation, double hydraulically balanced.
Style 677 SO
High performance in clean liquids and slurry with uncomplicated structure. Works in all applications in both vertical and horizontal pumps. Hydraulically balanced with monolithic design.
Style 770
Simple advanced design offering all the cartridge system advantages. Integrated cartridge concept makes this seal extremely easy to install with no modifications required.
Style 777 SO
Almost a double seal based on simplified design to facilitate off-the-shelf interchangeability. Ideal for most applications and plant standardisation.
Style 777 SW
Designed to double-seal all double sealing applications. Three fail-safe features guarantee maximum performance, incorporating a low specific gravity barrier fluid at higher pressure.
Metal Bellows Seals
Style 580
Available with Hastelloy C276 bellows and retainer (Style 581) or AISI 316 retainer with Hastelloy C bellows (Style 582). Suited for demanding chemical applications.
Style 590
Metal bellows rotary component seal for high temperature or cryogenic applications. Secondary seals in graphite. Available with driving pin and double ply bellows for higher pressure resistance.
Style 780
Important evolution in welded metal bellows mechanical seals. Cartridge mounted with metal bellows available in Hastelloy C276, Inconel 718 and other high-performance alloys.
Style 788
Double cartridge mounted rotary metal bellows seal. Metal bellows available in a wide range of materials. Also available with stationary bellows (Style 787).
Style 790
Metal bellows with secondary seals in graphite. Available with stationary bellows (Style 794), lip seal for leak-proof quench (Style 790Q), or throttle bushing options.
Style 798
Double cartridge mounted rotary metal bellows seal with secondary seals in graphite. Metal bellows available in a wide range of materials. Also available with stationary bellows (Style 797).
Component Mechanical Seals
Style 400
Ideal for applications requiring no metal contact with the pumped fluid. Based on advanced full-solid technology manufacturing method for superior chemical resistance.
Style 410
Designed for highly corrosive chemical applications including active organic compounds, strong oxidising and reducing agents, concentrated acids and salts.
Style 520-521
Best alternative where price/quality factor is critical. No dynamic O-Ring sealing on the shaft guarantees no fretting, with a narrow cross section for versatile installation.
Style 522
Designed for EN 12756-L1K standard machinery. Rubber bellows supported by a metal body, enabling operation in particularly heavy fluid applications.
Style 523-524
Component seal with Carbon B/FKM/AISI 316 construction paired with SiC/FKM seat. Reliable performance across a wide range of industrial applications.
Style 530
Popular, widely used, high volume seal. Large self-cleaning spring design suitable for most medium-level applications with dependable performance.
Style 531
Rotary pusher type mechanical seal with cylindrical heavy duty spring. Open spring design avoids accumulation of solids, with flexible drive tolerating shaft misalignment.
Style 550
Indispensable for maintenance and modern centrifugal pump manufacturing. Hydraulically balanced with full solid technology for reliable, long-lasting performance.
Style 551
Ideal for stuffing boxes with limited space. Conforms with EN 12756 L1K length requirements for easy interchangeability in compact installations.
Style 557
Ideal for plant standardisation with interchangeable faces and bidirectional wave springs, guaranteeing the best possible operating performance across applications.
Style 558-559
Pusher type rotating seal with PTFE wedge sealing on the shaft. The PTFE wedge retains sealed fluid and follows seal movement to compensate for shaft run-out.
API 682 Mechanical Seals
Style 700 API
Rotary single API 682 seal for clean fluid applications. Low, medium and high pressure design rotary faces available with floating or fixed throttle bushing.
Style 710 API
Double rotary API 682 seal for clean fluid applications. Low, medium and high pressure rotary faces with internal pumping ring for barrier fluid circulation.
Style 730 API
Single API 682 seal with single spring independent from rotation. Available with floating or fixed throttle bushing for versatile application requirements.
Style 750 API
Multiple springs positioned out of the fluid with fretting-free dynamic O-ring working on the seal face. Based on the reliable and time-tested Style 550 design with cartridge and sleeve.
Style 755 API
Double rotary API 682 seal with multiple springs out of the fluid. Fretting-free dynamic O-ring working on the seal face for maximum reliability.
Style 770 API
Based on the Style 770 modular system cartridge seal, successfully installed worldwide for more than 20 years. Features stationary springs and floating bushing.
Style 777 API
Double stationary API 682 seal with multiple springs out of the fluid. Symmetric design maximises the mean time between failures (MTBF) for critical applications.