The Spirax Sarco SRV66HC sanitary high-capacity pressure reducing valve is designed for steam, gases and liquids. It features a stainless steel 1.4404 body and ASME BPE clamp connections. The valve has a maximum operating pressure of 8 bar g, a maximum Kv value of 80.0, an internal surface finish of Ra<3.2µm, and low-leakage sealing. It is suitable for clean steam pressure control, steam pressure reduction for sterilisation equipment, and supply pressure control and stabilisation for clean gases and process liquids.
SRV66HC sanitary high-capacity pressure-reducing valve | Spirax Sarco
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SRV66HC Sanitary High-Capacity Pressure Reducing Valve | Spirax Sarco
Sanitary high-capacity pressure reducing valve for pressure control of steam, gases and liquids, with sanitary clamp connections.
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After-sales support
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Specifications
- Connection sizes
- DN25, DN40, DN50, DN65, DN80, DN100
- Connection type
- ASME BPE clamp (optional ISO 2852 sanitary clamp)
- Body material
- Stainless steel 1.4404
- Leakage class
- VDI/VDE 2174 (leakage rate <0.5% Kv)
- Internal surface finish
- Ra<3.2µm (optional electropolishing to Ra 0.25-0.8µm)
- Maximum operating pressure
- 8 bar g
- Operating temperature range
- -10°C to 180°C (FPM/FEPM diaphragm); -10°C to 130°C (EPDM diaphragm)
- Maximum design pressure
- 9.5bar @ 50°C
- Maximum design temperature
- 300°C @ 5.8bar g
- Pressure setting range
- 0.3-5.0 barg (DN40-DN100 PN10/PN2.5: 0.3-1.1; DN25-DN100 PN10/PN6: 0.8-2.5; DN25-DN100 PN10/PN10: 2.0-5.0)
- Maximum Kv value
- 4.0 (DN25), 22.0 (DN40/50), 60.0 (DN65), 70.0 (DN80), 80.0 (DN100)
- 20% offset Kv value
- 3.1 (DN25), 16.9 (DN40/50), 46.2 (DN65), 53.9 (DN80), 61.6 (DN100)
- Diaphragm materials
- FEPM (optional EPDM, FPM)
- Applicable media
- Steam, gases, liquids
- Maximum design cold test pressure
- 15.2 bar g
Application scenarios
Sanitary clean steam pressure regulation
Used in clean process steam pipelines to regulate the higher upstream pressure to the pressure required by downstream equipment or points of use. The product features a stainless steel 1.4404 body and sanitary clamp connections. An electropolished internal surface is available as an option. It is suitable for steam service within the specified pressure and temperature ranges.
Steam pressure reduction for sanitary process sterilization equipment
Installed on the steam supply branch serving disinfection or sterilization equipment to provide regulated steam pressure to the equipment. The product is suitable for steam service, uses sanitary clamp connections, and can be operated within the specified operating pressure and temperature ranges.
Sanitary clean gas supply pressure regulation
Used in clean process gas supply pipelines to reduce and stabilize the pressure of gas entering equipment or process branches. The product is suitable for gas service, features a stainless steel 1.4404 body and sanitary clamp connections, and has a pressure setting range of 0.3 to 5.0 barg.
Sanitary process liquid supply pressure regulation
Used in sanitary process liquid supply pipelines to regulate the pressure of liquid entering equipment or process branches. The product is suitable for liquid service, provides connection sizes from DN25 to DN100 and a maximum Kv value of 80.0, and uses sanitary clamp connections.
Selection points
High flow capacity and high Kv values
The SRV66HC is a sanitary high-capacity pressure-reducing valve with a maximum Kv value of up to 80.0 in DN100 size. It is suitable for pressure reduction applications requiring high flow rates for steam, gases, or liquids.
Internal surface finish with optional electropolishing
The standard internal surface finish is Ra<3.2µm, with optional electropolishing to Ra 0.25-0.8µm.
Diaphragm material and temperature limits matched to the medium
Applicable media include steam, gases, and liquids. Diaphragm options are FEPM, FPM, and EPDM. The operating temperature range for FEPM/FPM is -10°C to 180°C, while the range for EPDM is -10°C to 130°C. Selection should be based on the medium and temperature.
Installation & maintenance notes
Observe the diaphragm temperature range
Control the operating temperature according to the diaphragm material: -10°C to 180°C for FEPM or FPM diaphragms, and -10°C to 130°C for EPDM diaphragms. Exceeding the applicable temperature range may accelerate diaphragm ageing or cause failure.
FAQ
What sizes and connection types are available for the SRV66HC?
Available sizes are DN25, DN40, DN50, DN65, DN80, and DN100. The standard connection type is an ASME BPE clamp, with an ISO 2852 sanitary clamp available as an option.
What diaphragm and soft seal material options are available for the SRV66HC?
FPM diaphragms and soft seals are available for steam systems, with a maximum operating temperature of 180°C. EPDM diaphragms and soft seals are also available for gas and liquid systems, with a maximum operating temperature of 130°C. The specific configuration must be confirmed according to the actual model and application conditions.
What pressure setting ranges are available for the SRV66HC?
Three spring ranges are available: 0.3-1.1 barg, 0.8-2.5 barg, and 2.0-5.0 barg. The corresponding inlet/outlet pressure ratings are PN10/PN2.5, PN10/PN6, and PN10/PN10, respectively. The specific configuration must be confirmed according to the actual model and application conditions.
How are the Kv values used to select an SRV66HC?
The SRV66HC uses a 20% offset Kv value to improve control accuracy. The maximum Kv value should be used when sizing a safety valve. The maximum Kv values for the available sizes are 4.0 for DN25, 22.0 for DN40 and DN50, 60.0 for DN65, 70.0 for DN80, and 80.0 for DN100.
What are the design and operating temperature and pressure limits for the SRV66HC?
The maximum design pressure of the body is 9.5 bar at 50°C, the maximum design temperature is 300°C at 5.8 bar g, the maximum operating pressure is 8 bar g, and the minimum operating temperature is -10°C. The maximum operating temperature is 130°C with an EPDM diaphragm and 180°C with an FPM diaphragm.