The GS Series product line offers a wide range of dome loaded control valves for installations requiring reliable and high precision control of gas, liquid or mixed-phase flow.
The GS Series comes in 4 different models and 5 different sizes:
All models are availabe in 5 line pipe sizes, ranging from 1/8″ to 1″ for optimal scaling and integration into the customer application at hand.
Because of the many available material options, these control valves can be made chemically resistant to even aggressive process media and they can easily be tailored to any other application requirements of the customer. For example: We offer GS units with PGL (PTFE glass reinforced) diaphragms & Viton o-rings for process conditions up to 175°C, as well as GS units equipped with metallic or polyimide diaphragms and Kalrez o-rings for process conditions up to 300°C!
If the many standard options do not meet your application needs, customized units can be engineered specifically for your process requirements. An example of this is the special GSDH2 back pressure regulator that was designed to handle a pressure of 250 bar gauge at a maximum of 300°C, with a required Cv of 1.7. Read the related blog in the Expertise area on this website: Special GSDH2 Back Pressure Regulator.
This GS Series product line is positioned between the multiple models of the Research Series on the one hand – the control valves in the Research Series offer a Cv-range between 0 to 0.6 – and the larger units in the BD Series, offering up to 4” piping with a capacity Cv of 160.
|Main specifications of GS Series summarized
For complete overview, please see the product brochure, installation & maintenance guide and drawings via the tabs on the left side of this table.
Contact us if you cannot find what you are looking for!
|Often used in||Pilot plants, small scale production processes
Capable of handling variety of process media, in gas, liquid & two-phase-flows
|Available models||GS(X) lower pressure models | no O-rings
GSD(X) lower pressure models | standard o-ring design
GSDM(X) medium pressure models
GSDH(X) high pressure models
|MAWP at 300°C*||GS(D)2|
|*For SS316 unit; see brochure for details other units|
Turn down ratio*
|*Values for metallic diaphragms other than aluminum; turn down ratio for polymeric diaphragms is generally higher|
|MAOT (in °C)||≤ 40°C for polymer bodies
≤ 150°C for metal bodies + PTFE diaphragm + Viton® O-rings
≤ to 200°C for metal bodies + metal diaphragm + Viton® O-rings
≤ 300°C for metal bodies + metal diaphragm + Kalrez® O-rings
|Port thread options||SAE
ANSI class 150/300 flanges
Custom options upon request
|Body & cap |
|Alloys: SS316/316L, Anodized aluminum
|Body & cap |
|Alloys: Inconel 625, Hastelloy C276/C22, Monel, Titanium, Zirconium
Polymers: PEEK, PTFE, PVDF
|Alloys: Stainless Steel 316/316L, Hastelloy C276/C22, Monel
Polymers: Buna-N (Nitrile), EPDM, FKM
Fluoroelastomer (Reinforced), Kel-F, PEEK, PTFE (Glass reinforced), PTFE (Virgin, FDA), PTFE Enhanced (USP Class VI), Polyethylene, Polyimide (Kapton®)
Diaphragm thickness will be selected by our engineers based on your process parameters
|Alloys: Kalrez® Grade 7075/7090/6375/ 6230
Polymers: Viton® Shore 75/90, PTFE, EPDM Grade 70, Buna-N
Other materials upon request
|Body & cap material certificate 3.1.B
Diaphragm/O-ring material certificate (FDA and/or USP Class VI)
Surface finish certificate
Thread lubricant certificate (FDA)
Certificate of conformance 2.1
Assembly & Test certificate (leak and/or equilibrium flow testing)
Design certificate (MAWP according to ASME B31.3)
Notified-Body-declaration “simple apparatus” ATEX Directive 2014/34/EU available upon request
|Product options||Can be supplied with mounting brackets
|Spare part kits and/or Rebuild kits optionally available
See: Spare Parts and Maintenance
|Electronic & manual pilot control options available
See: How to pilot your back pressure regulator