SchuF & Fetterolf Piston Bottom Outlet Valve

SchuF & Fetterolf Piston Bottom Outlet Valve

SchuF ram bottom outlet valves (BOVs) are ideal for draining tanks, reactors or pipelines containing viscous media or where rapid vessel drainage is important. SchuF ram BOV valves are dead space free, without sharp corners or edges, for fast and compete draining. A wide range of materials for body and trim are available to suit application needs. The valves can be cleaned in place through standard flushing ports for easy maintenance.

Design Parameters

Pressure Class:Up to ASME 2500#
Temperature:Material dependent
Dimensions:DN25-DN600
Size Range:1" to 24"
Certification:ISO 9001, PED, GOST (company certifications)
Material:Stainless Steel, Carbon steel, Alloys
  • High‑temperature vessel drain
  • Polymer melt service
  • Reactor discharge
  • Slurry and catalyst handling
  • Viscous media
  • Zero‑dead‑space bottom outlet service

Frequently Asked Questions

Find quick answers to some of the most common questions

How does a SchuF Piston Bottom Outlet Valve eliminate reactor dead space?

The valve’s solid piston extends fully into the vessel drain nozzle, sitting flush with the reactor floor to eliminate stagnant pockets and ensure complete batch mixing.

What is the difference between a Piston-Type and Disc-type Bottom Outlet Valve?

Piston valves retract downward into the valve body for full-bore flow, while disc valves extend upward into the vessel to break through heavy bottom crusts and polymer buildup.

How do SchuF Bottom Outlet Valves handle crusting and solid buildup?

Precision-machined metallic pistons physically break through bottom crusts during stroke movement, supported by optional body flush ports that inject solvent or steam to clear solids.

Can SchuF Piston Bottom Outlet Valves be serviced without unbolting from the reactor?

Yes. Rear-entry bonnet designs allow maintenance crews to extract the piston, stem, and packing sets from below without disconnecting the main body flange from the vessel nozzle.

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    Marc Soucy, P.Eng

    National Sales Manager

    I am a mechanical engineer with 35+ years of experience in plant operations, maintenance, and technical sales. As National Sales Manager I bring deep expertise in the power industry and specialty valve market. Having worked on both sides of the desk, I understand the challenges plant teams face. You can trust that I won’t recommend a product unless I know that it will do the job for you.

    Marc Soucy, P.Eng

    Directeur National des Ventes

    Je suis ingénieur en mécanique et possède plus de 35 ans d'expérience en exploitation, maintenance et ventes techniques industrielles. En tant que directeur national des ventes, j'apporte une expertise approfondie du secteur de l'énergie et du marché des vannes spécialisées. Ayant travaillé sur ces deux fronts, je comprends les défis auxquels sont confrontées les équipes d'usine. Soyez assuré que je ne recommanderai aucun produit sans être certain qu'il répondra à vos besoins.