Throttle valves

RTDK

DN
100 – 3.000
PN
10 – 100

Centric and double eccentric butterfly valves with electric, pneumatic or hydraulic actuators. Flexible designs and lengths due to welded constructions. Ideally designed for your needs. Convincing control behaviour at low torques. Available as double flange version or with welding end. Ideally suited for liquid and gaseous media.

Operating pressure: max. 100 bar
Operating temperature: -200°C bis +900°C
Sitzgeometrie: Centric/double
Shaft bearing : eccentric depending on operating temperature
Inner seal: soft sealingouter
Outer seal: up to max. 200° C double O-ring sealing, >200° C low-maintenance stuffing box seal made of pure graphite
Drosselklappe RTDK

Rohrsystemtechnik Drosselklappe (RTDK) - Zentrische und doppeltexzentrische Drosselklappe

Rohrsystemtechnik Drosselklappe (RTDK) - Zentrische und doppeltexzentrische Drosselklappe
Application overview, types of actuation, valve types
Branch of industry RTDK  
Actuation RTDK
Manual control  
Electrical drive  
Pneumatic drive 3, 5
Hydraulic drive 3, 5
Drop weight drive 1, 4
Lever & weight 4
Oil brake 4, 6


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

 

Valve type  
RTDK Throttle valve “without locating ring” / „with locating ring“ centric, p max. 100 bar, -328° F to 1742° F, DN 100-3000, PN 6/10/16/25/40/64/100 bar, ANSI 150/300/600, 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

• soft sealing to EN 593
• 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-
• flow-optimised, free-swinging disc-
• corrosion-protected bearing arrangement in the body by means of double O-ring seal and closed bearing eyes on the disc-
• wear-resistant, corrosion-resistant, flow-optimised and infiltration-proof body seat
• sealed against backflow to EN12266

Material, corrosion protection, versions

Material

• Body: P265GH (1.0425); P355NL1 (1.0566), SA516 Gr.60/70; X5CrNi18-10 (1.4301); X6CrNiMoTi17-12-2 (1.4571)
• Butterfly disc: P265GH (1.0425); P355NL1 (1.0566), SA516 Gr.60/70; X5CrNi18-10 (1.4301); X6CrNiMoTi17-12-2 (1.4571) • • inner seal: Perbunan, EPDM, Viton, PTFE
• outer seal: Perbunan, EPDM, Viton, PTFE
• butterfly valve shaft: Stainless steel 1.4021
• body seat: High-alloy build-up welding or wear-resistant, stainless steel, precision machined other materials on request

 

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 backflowing medium
• with lever, adjustable counterweight and hydraulic end position cushioning for backflowing medium -
• with lever, adjustable counterweight, hydraulic end position cushioning and forced control to minimise pressure loss
• with lever, adjustable counterweight, hydraulic end position cushioning and forced control as closing support for backflowing medium
• with analogue or digital position indicator
• enamelled or with special coating on request
• suitable for gas according to en 13774