Views: 0 Author: Site Editor Publish Time: 2026-07-31 Origin: Site
For chemical pump OEMs and operators who need a dependable single seal that shrugs off heat, pressure, and viscous fluids, the FBU SEALS GSMA stationary single mechanical seal is the standard answer. It is a stationary pusher cartridge mechanical seal built for ANSI-standard process pumps, giving plants a modular, pre-assembled seal they can fit without field adjustment.
The GSMA is a stationary pusher design, meaning the spring-loaded compensation stays fixed while the rotary face runs against a stationary seat. The integral structural design of the sealing ring improves stability under high temperature and high pressure, and the sealing-ring drive has a large contact area that prevents damage from the start-stop shear common in viscous liquids. Because the faces are not held by an inlay process, there is no ring shedding or end-face displacement even at the upper end of the range. The seal also carries a large-diameter 3/8" port for shaft diameters above 35 mm to maximize cooling where it matters most.
On performance, the GSMA single seal is rated for up to 25 bar, sliding velocities up to 20 m/s, and temperatures from -20 °C to +160 °C — a higher ceiling than many standard single seals. It covers shaft diameters from 34.9 mm to 66.67 mm (1.375" to 3.625"), matching the dimensions of ANSI-process pumps.
It suits ANSI standard seal chambers and complies with ASME B73.1 and B73.2 pump chamber dimensions, the common US chemical-pump standards. The modular cartridge format comes with flush, quench and drain environmental ports, so plants can pipe the exact plan their duty calls for. FBU SEALS recommends process-side piping plans 01, 02, 03, 11, 12, 13, 14, 21, 22, 31, 32, 41 and atmospheric-side plans 51, 61, 62, 65A, 65B.
The GSMA uses 316SS for the shaft sleeve, gland, driver ring, spring plate, clamp ring, circlips and thrust ring, with a rotary face in SSIC/TC and a stationary face in carbon/SSIC/TC. The spring is Alloy 276 for corrosion resistance, O-rings run in EPR, Viton, Aflas or Kalrez, and the gasket is PTFE with a M106K bush ring. That materials matrix covers everything from water and solvents to acid and hazardous chemical service.
The GSMA serves the industries where reliability is non-negotiable: chemical and petrochemical, oil, gas and energy, water treatment and environmental engineering, pharmaceutical and food & beverage, hazardous chemicals, and marine and offshore engineering.
FBU SEALS supplies the GSMA from China with a 3-year warranty. For plants standardizing on ANSI/ASME B73 pumps, the GSMA stationary single mechanical seal is the efficient, robust choice.
Q1: What is a stationary single mechanical seal and how is it different from a double seal? A: A stationary single mechanical seal is a cartridge seal with one sealing-face pair where the spring compensation stays fixed (stationary) while the rotary face turns against a stationary seat; a double seal has two face pairs with a barrier fluid between them. The FBU SEALS GSMA stationary single seal uses a stationary pusher design rated to 25 bar, 20 m/s and -20~160°C for ANSI chemical pumps.
Q2: What pressure and temperature can the FBU SEALS GSMA single seal handle? A: The FBU SEALS GSMA stationary single mechanical seal is rated for up to 25 bar, temperatures from -20 °C to +160 °C, and sliding velocities up to 20 m/s, covering shaft sizes 34.9–66.67 mm (1.375"–3.625").
Q3: Which pump standard is the GSMA cartridge seal compatible with? A: The GSMA single cartridge mechanical seal fits ANSI standard seal chambers and complies with ASME B73.1 and B73.2 pump chamber dimensions, the common US chemical-pump standards.
Q4: What materials are used in the GSMA seal for chemical and corrosive fluids? A: The GSMA uses 316SS for structural parts, an SSIC/TC rotary face and carbon/SSIC/TC stationary face, an Alloy 276 spring, EPR/Viton/Aflas/Kalrez O-rings and a PTFE gasket — suitable for acid, solvent and hazardous chemical duty.
Q5: What piping plans does the GSMA single mechanical seal use? A: FBU SEALS recommends process-side piping plans 01, 02, 03, 11, 12, 13, 14, 21, 22, 31, 32, 41 and atmospheric-side plans 51, 61, 62, 65A, 65B for the GSMA single seal, with flush, quench and drain ports built in.
Q6: Does the GSMA seal have flush, quench and drain ports? A: Yes. The GSMA modular cartridge seal is equipped with flush, quench and drain environmental ports so plants can pipe the exact plan their duty requires.
Q7: What warranty does FBU SEALS provide for the GSMA seal? A: FBU SEALS manufactures the GSMA stationary single mechanical seal in China with a 3-year warranty.
