RH-A

Control valve with chemical-resistant, vacuum-proof lining

DIN-EN: DN 15 – 200 / PN 10 – 40
ASME: NPS ½“ – 8“ / class 150
PT range: -30 < T < 230°C, vacuum 10-8 mbar

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SPEC SHEET
CERTIFICATE
3D rendered image of a green and gray industrial valve with detailed internal components visible, including a central triangular mechanism, from a valve distribution company in Louisiana.
Design Features

Design Characteristics

  • different KVS values
  • individual control characteristics
  • free passage possible with open valve
  • equal percentage or linear characteristic line
  • cost-effective automation
  • readily reproducible control position

The construction of the RH-A control valves is based on our standard cavity-free plug valve with chemical resistant PFA/FEP-lining. A wide range of materials for housings, plugs, as well as for sleeves or linings are available for different areas of application. If required, the control valves can also be supplied with a heating jacket.

Close-up of a stainless steel control scale on machinery with dial indicators and visible numeric markings, tailored for fluid monitoring solutions.
PT-Diagram
A line graph titled "general pressure-temperature-diagram" with two lines representing tailored fluid monitoring solutions (solid blue) and fep (dashed blue) materials against "c°" on the

The specified values depend on the respective application (medium). Operating temperatures under -20°C only with body material 1.4408 or low-temperature steel. Hight pressure resistance / temperature resistance on request, e.g. PN 40.

Sleeve: There are different sleeve materials / compounds available.

Materials

Standard body materials
• Ductile cast iron ENJS 1049, ASTM Gr 60-40-18 / A395

Standard plug materials
• Stainless Steel 1.4308, ASTM A351 CF8

Special materials
• Carbon Steel 1.0619, ASTM A216 WCB
• Stainless Steel 1.4408, ASTM A351 CF8M
• Unalloyed stainless steel casting (low Temp.) 1.1138, LCC/LCB/A352

Lining materials
• Body: PFA, PFA-conductive, FEP
• Plug: PTFE, PFA, PFA-conductive, FEP

Sealing Systems

Type CA

Chemical sealing to prevent fugitive emission of aggressive and toxic media
with PTFE packing for additional stem sealing; Tmax 230°C

A cross-sectional diagram of a chemical sealing type ca valve highlighting the multiple layers of sealing with ptfe components to prevent emission of aggressive and toxic media, labeled with temperatures and materials, provided by an industrial

Type CASN-A

Chemical sealing for fluctuating temperatures to prevent fugitive emission of aggressive and toxic media with PTFE packing for additional stem sealing; Tmax 230°C

Diagram of a chemical sealing type casn-a valve detailing its multiple sealing layers and components, distributed by an industrial supply company in Louisiana. It is annotated with labels for parts like thrust bearing and ptfe
Port Forms
Two side-by-side images: on the left, a valve from a valve distribution company in Louisiana displaying a 3D model of a valve with a graph labeled "equal percentage control characteristics," and on

As standard, there are ten plugs forms available per valve size, consisting of five linear and five equal percentage control characteristics.

Furthermore, bespoke plug forms can be calculated and designed according to customer-specific requirements that combine, for example, control properties and free passage.

Characteristics
An image displaying the characteristics of ptfe/pfa lined plug valves with equal percentage control. There are tables listing types and specifications, alongside images of the valves provided by a valve distribution company in Louisiana.
Image depicting three types of high-performance industrial valves with their technical specifications listed in a table beneath, showing din and nps sizes along with various pressure ratings and kv values, tailored for fluid monitoring solutions.

Model structure
The data was determined by flow simulation and based on the VDI/VDE 2173 with a permissible deviation of +/- 10% (medium = water 20°C, pressure loss Δp = 1 bar).

Definition Kvs
The Kvs value designates the maximum possible throughput for a valve with a 100% opening

Definition Kv
The flow coefficient Kv [m3/h] is a specific volume flow for the following conditions:
– The pressure loss (Δp) via the valve is 105 Pa (1 bar)
– The medium is water with a temperature between 278 K and 315 K (5°C to 40°C)

Definition Cv
The flow coefficient Cv is a valve flow coefficient that does not correspond to S.I. units. It represents the number of U.S. gallons of water which flow through a valve with a pressure loss of 1 psi (68.95 mbar) at a temperature of 40°F to 100°F (4°C to 38°C) within a minute. Cv = Kv/0,865

Actuation

1 Locking Devices
Pilot valve combinations, pad lock eyelets, linear key conception, indexing plunger arrestor.

2 Plug stem extension
Solid construction in stainless steel with T-wrench, Standard extension 100 mm or 150 mm, non standard lengths are available on request

3 Actuators
Actuators for mounting-flange acc. to DIN ISO 5211

NEW: Pneumatic actuator AIR GEAR for plug valves with high torque ≥150.000 Nm

4 Ratched coupling
To usw on multiport valves with standard 90° actuator for bigger switchpositions than 90°

5 Cover extension
Solid construction in stainless steel, Standard extension 100 mm or 150 mm high, non standard lengths are available on request . Hexagonal bolts on adjustment ring freely accessible. Note: Don’t use with sealing FSN/FSN-SL and CASN/CASN-SL

Diagram showing components and assembly options for industrial valves, including hand operation, lever with optional devices, solenoid actuator, emergency hand operation, various couplings, extensions, and bracket-types. Ideal