Butterfly valve (HPAK)


100 – 3.000
10 – 150

Triple eccentric flanged butterfly valve with epoxy coating in long or short overall length in welded steel for various medium ranges; among other things also suitable for oxygen applications. Thermal expansion shaft bearing made of hardened, maintenance-free stainless steel. Due to the triple eccentricity, clogging of the damper seal is impossible. The valve can be used at extreme temperatures up to +600°C using lamellar or masiv (solid) seals and graphite packings.

Working pressure: max. 150 bar
Working temperature: -200° C bis +600° C
Seat-geometric: Triple eccentric,
thus sealing without wear and jamming
Shaft bearing: Hardened plain bearing Metallic
lamellar seal or masiv (solid)
Outer seal: Low-maintenance stuffing box seal made of pure graphite


Absprerrklappe HPAK

HPRK - Tilting disc check valve 56“ / Class 150

HPAK - Butterfly valve 20", Class 150

HPAK - Butterfly valve 20", Class 150

Application overview, types of actuation, valve types
Branch of industry HPAK  
Actuation HPAK
Manual control 1
Electrical drive 1, 2
Pneumatic drive 1, 2, 3
Hydraulic drive 1, 2, 3
Drop weight drive 1, 4
Lever & weight  
Oil brake  

1)Open - Close, 2) Controlled, 3) Quick opend - closed, 4) Closed by gravity 5) Forced controlled, 6) Damped

HPAK Butterfly valve “metal seated” triple excentric, p max. 100 bar, -328° F to 1112° F, DN 100-3000, PN 10/16/25/40/64/100/150 bar, ANSI 150/300/600/900, Material: Carbon steel/ SS
Power plant
- Cooling water
- Air condenser
- Heating water
- Steam turbine
- Steam circuit

Water, Sea water  
Water dam  
District heating
Steam generation  
Pump station  
Gas, Natgas
Mineral oil
On-shore, Off-shore
Garbage incineration  
Mining industry
Mechanical engineering
Sugar industry
Paper industry  

• Recommended application

Product features and benefits

• metal sealing (lamellar seal or solid)
• overall length according to EN 558-1, basic series 14 (DIN 3202, F4)
• with flange connection on both sides in accordance with EN 1092 / ANSI B16.5 and B16.47
• no jamming due to triple eccentricity
• wear-resistant, corrosion-resistant, flow-optimised and infiltration-proof housing seat
• replacement of the valve seal possible without dismantling the valve disc
• use at extreme temperatures up to +600° C
• in both flow directions tight according to EN 12266
• can be combined with a wide range of control drives (manual, electric, pneumatic, hydraulic)

Material, corrosion protection , versions


• Body: P265GH (1.0425); P355NL1 (1.0566); 16Mo3 (1.5415); SA516 Gr.60/70; 13CrMo4-5 (1.7335); 21CrMoV5-7 (1.7709); X5CrNi18-10 (1.4301); X6CrNiMoTi17-12-2 (1.4571)
• Butterfly disc: P265GH (1.0425); P355NL1 (1.0566); 16Mo3 (1.5415); SA516 Gr.60/70; 13CrMo4-5 (1.7335); 21CrMoV5-7 (1.7709); X5CrNi18-10 (1.4301); X6CrNiMoTi17-12-2 (1.4571)

• Internal sealing: metallic
• Outer seal: low-maintenance stuffing box seal made of pure graphite packing
• Butterfly valve shaft: stainless steel 1.4021/ 1.4122
• Body seat: High-alloy build-up welding or made of wear-resistant, stainless steel, finely machined
other materials on request


Corrosion protection

• Housing: Inside and outside epoxy coating according to GSK-guidelines possible

• Valve disc: Epoxy coating according to GSK guidelines possible (Exceptions: DN100-125, stainless steel valve disc)


• with electric drive
• with handwheel
• with pneumatic drive
• with hydraulic drive
• enamelled or with special coatings on request
• suitable for gas according to EN 13774