The CX valve: Superior with hydrogen

Hydrogen gas needs a special valve. Compressor operation with hydrogen or hydrogen rich gases is related to typical

load patterns with subsequent characteristic damages in conventional compressor valves.

Load due to condensate

Due to the low molecular weight

and saturation of gases in process

appli cations such as hydrodesulphuria-

tion, compressor valves are frequently

exposed to liquids.

Load due to over-lubrication

Many H2-compressors are operated with

an extensive amount of lubrication in

order to improve gas tightness. Due to

the low density of hydrogen, however,

the oil is only partially carried with the

gas flow. This leaves a considerable

amount of oil film sticking to the valves.

In addition, H2-compressors are com-

monly equipped with an on/off control.

In these cases the oil gathers in the

cylinder during idling and has to be

pushed through the discharge valves

when loading is resumed, thus causing

additional load.

Contamination

Light gases such as hydrogen do not

contribute to the self cleaning of flow

channels which are therefore often

clogged by debris, resulting e. g., from

catalyst degradation. This factor leads to

reduced compressor efficiency.

Characteristic damage appearances

in conventional valve design:

■ Breakage of sealing elements caused

by liquid slugs or high opening and

closing impact resulting from

oil sticktion

■ Spring failure caused by high

opening impact and dynamic

contact of spring coils

■ Higher valve losses caused by

clogged flow channels resulting

in higher power consumption and

higher discharge temperatures

Indicator diagram 1

shows considerable oil sticktion with

conventional suction and discharge

valves

Indicator diagram 2

shows virtually no oil sticktion

after retrofit to CX valve

The CX valve proves operational excellence in hydrogen applications.

Practically no more oil sticktion

problems

thanks to perfectly matched seat, ring

and guard profiling

Extremely robust and efficient

thanks to low lifts and wide flow

channels

Extremely long life

thanks to the newest impact-resistant

and tribologically optimised

MC ring materials

No problems during start-up

thanks to extreme tightness caused by

the special ring design

Resistance to high loading

thanks to dynamically designed robust

springs, exactly adapted to the applica-

tion

Non-sticking coating possible

for applications with extreme high risk

of contamination

The specific design of the HOERBIGER CX valve meets your requirements

in terms of reliability and efficiency.

Industries:

■ Refineries

■ Petrochemical industry

■ Chemical industry

Processes:

■ Hydrocracking

■ HDS (Hydrodesulphurisation)

■ RDS (Residue Desulphurisation)

■ CCR (Continuous Catalytic

Reforming)

■ Coke oven gas applications

Application range

(valve ring material MC/PC):

Max. operation pressure: 200 bar

Max. differential pressure: 100 bar

Max. operation temperature: 230° C

Lube and non-lube cylinder

Max. compressor speed: 1000 rpm

Technical features:

Valve diameters: 60 – 310 mm

Valve type: 60 CDX – 310 CHX

Control:

On/off and HydroCOM stepless control

Your benefit: extreme robust and reliable

✔ anti oil sticktion design

✔ dynamically optimised springs

✔ extremely impact-resistant ring materials

✔ robust ring design

✔ low lift

Your benefit: best efficiency with contaminated and saturated gases

✔ low energy consumption

✔ optimised flow geometry

✔ optimised sealing

✔ no start-up problems

✔ stepwise and stepless control using HOERBIGER HydroCOM

✔ optional non-sticking coating

The advantages of the CX valveat a glance

Alliance Refining Co., Thailand

Shell, France

OMV, Austria

Shin Nihon Sekiyu, Japan

Shin Nihon Sekiyu, Japan

Yangzi Petrochemical, China

Reliance, India

CCR Net Gas Booster

HDS

HDS

HDS

RDS

CCR Net Gas Booster

Hydrotreating

32000 hrs

32000 hrs

24000 hrs

24000 hrs

16000 hrs

16000 hrs

16000 hrs

The CX valve has proved its operational excellence since 1998:

AK

T2C

V00

7B

E2

00

91

2

HOERBIGER Compression Technology is a business unit of HOERBIGER Holding AG, Zug / Switzerland. HOERBIGER is active

throughout the world as a leading player in the fields of compression technology, automation technology and drive technology.

Its 6,400 employees achieve sales of around 1 billion Euros. The focal points of its business activities include key components

and services for compressors, gas engines and turbomachines, hydraulic systems and piezo technology for vehicles and machine

tools, as well as components and systems for shift and clutch operations in vehicle drive trains of all kinds. Through innovations in

attractive technological niche markets, the HOERBIGER Group sets standards and delivers cutting-edge solutions for the benefit

of its customers.

www.hoerbiger.com