Swing seat non-return valves

HPRK

DN
100 – 2.000
PN
6 – 40

Triple eccentric flanged non-return valves with epoxy coating in long short overall length or in welded steel design with flow-optimised free-swinging disc. For use in water and steam applications. Non-jamming flap seal thanks to
optimised angled seat geometry. Reduced closing time thanks to shorter valve disc stroke.

Working pressure: max. 40 bar
Working temperature: -200°C bis +600°C
Seat-geometric: Triple eccentric,
therefore wear and clamp-free sealing shaft bearing
Shaft bearing: Triple eccentric,
therefore wear and clamp-free sealing shaft bearing
Inner seal: metallic lamellar seal or solid outer
Outer seal: low-maintenance stuffing box seal made of pure graphite		   SIL-Fähig

 

Schrägsitzrückschlagklappe HPRK
Application overview, types of actuation, valve types
Branch of industry HPRK  
Actuation HPRK
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


Valve type  
HPRK Tilting disc check valve “metal seated” triple-Ex.- centric, p max. 50 bar, -328° F to 1112° F, DN 100-2000, PN 6/10/16/25/40 bar, ANSI 150/300, 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 •
Chemistry •
Petrochemistry •
Refinery •
Garbage incineration  
Mining industry •
Mechanical engineering •
Sugar industry •
Paper industry •
Shipbuilding •


• Recommended application

Product features and benefits

• metal-sealing
• face-to-face length to EN 558-1, basic series 14 (DIN 3202, F4)
• with flange connection on both sides to EN 1092 / ANSI B16.5 and B16.47
• no jamming due to triple eccentricity
• low-flow, free-swinging disc
• wear-resistant, corrosion-resistant, flow-optimised and infiltration-proof body seat
• replacement of the valve seal possible without dismantling the disc
• use at extreme temperatures up to +600° C
• tight against backflow to EN12266

Material, Korrosionsschutz, Versionen

Material

• 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)
• Valve 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)
• inner seal: metallic
• outer seal: pure graphite
• shut-off valve shaft: stainless steel 1.4021/ 1.4122
• body seat: high-alloy build-up welding or made of wear-resistant, stainless steel, precision machined others

 

Corrosion protection

• Body: Inside and outside epoxy coating according to GSK guidelines possible-
• Valve disc: Epoxy coating according to GSK guidelines possible (Exceptions: DN100-125, valve disc made of stainless steel)

Versions

• without closing support
• with lever and adjustable counterweight as gravity-dependent closing support for return flow medium
• with lever, adjustable counterweight and hydraulic end position damping for return flow medium
• with lever, adjustable counterweight hydraulic end position damping and forced control to minimize pressure loss
• with lever, adjustable counterweight, hydraulic end position damping and forced control as closing support for return flow medium

with analog or digital position indicator