Valves & Regulators

Diaphragm Valves

High purity diaphragm valves are specialized valves designed for applications that require the handling of ultra-pure or high-purity fluids, gasses, or chemicals without contamination. Diaphragm valves consist of a valve body, an actuator, and a diaphragm.

In high purity diaphragm valves, special attention is paid to the design and materials to minimize contamination. These valves are designed to have zero dead space in the flow path, which means there are no crevices or pockets where fluid can stagnate and potentially lead to contamination or microbial growth.

There are many different types of diaphragm valves for different types of application including low pressure manual, low pressure pneumatic, high pressure spring or springless, high pressure compact, low pressure/medium flow, low pressure/high flow, low pressure/ultra high flow, high temperature, atomic layer deposition and economic diaphragm valves.

In summary, high purity diaphragm valves are crucial components in industries where maintaining the purity of process fluids is critical. Their design and materials are carefully chosen to prevent contamination and ensure precise control of fluid flow, making them indispensable in high-purity applications.

At Omni Services, we recognize the importance of matching the valve to the specific application and customer, and that is why we work closely with engineering, purchasing departments and users to ensure the correct valves are selected for your system.

With over 40 years of fluid conveyance experience, Omni Services can identify the right valve for your application and craft an efficient fluid conveyance solution with unparalleled speed.

Bellows Valves

Bellows valves typically consist of a body, bonnet, stem, actuator, and the bellows assembly. The body houses the internal components, and the bonnet secures the bellows and the stem. The actuator is responsible for moving the stem to open or close the valve.

A bellows is a flexible, corrugated metal cylinder that expands and contracts with changes in pressure. It acts as a pressure-responsive element and helps to provide a hermetic seal within the valve. The bellows can expand or compress with changes in the pressure of the fluid inside the valve.

This property allows the bellows valve to accommodate varying pressure conditions without causing damage to the valve or affecting its sealing capability in high purity systems.

The first two series featured below show Bellows-sealed valves for either low or high pressure high purity systems while the third is a Bellows-Sealed Metering Valve.

SM Series

  • Metal-to-metal gasket seal without external leakage
  • Precision-formed metal bellows to ensure reliability
  • Non-rotating stem tip to increase shutoff cycle life
  • Manual and pneumatic actuator available
  • Pneumatic actuator to rotate 360° for ease of installation
  • Panel mounting and bottom mounting available
  • Position sensors available assembled on normally closed pneumatically actuated valves

SVH Series

  • Packless valves with all-metal seal to atmosphere
  • Compact designed body with minimal dead space
  • 316L SS precision-formed bellows for long cycle life
  • PCTFE stem tip material with remarkable chemical and thermal resistance
  • Normally closed and normally open pneumatic actuator optional
  • Bottom mounting
  • Normally open and normally closed position sensors optional

MU Series

  • Reset spring design with no backlash for precise, repeatable flow settings
  • Micrometer handle measures stem position in 0.0008 in. (0.02 mm) increments
  • Valves open to maximum flow in six turns
  • Metering and regulating stem tips available
  • Modular design to reduce maintenance cost
  • Slotted handle tops enable adjustment with a screwdriver
  • Lock screw secures flow settings

Check Valves

Check valves, also known as non-return valves or one-way valves, are critical components used in high purity systems to allow the flow of fluids in one direction only. The primary function of check valves is to allow fluid flow in one direction while blocking flow in the opposite direction. This ensures that fluids can move freely through a pipeline or system in the desired direction and prevents backflow, which could cause contamination or interfere with the process.

The CW series has a variety of end connections available with an internally threadless and all-welded design. This series has a forward flow that starts at less than 2 psig (0.14 bar) pressure differential and a standard surface roughness finished to an average of Ra 20 μin. (0.51 μm) or electropolished to Ra 10 μin. (0.25 μm) optional.

Ball Valves

Ball valves are a type of valve that uses a ball with a hole in the middle to control the flow of fluid. The primary function of ball valves is to control the flow of fluids quickly and easily by opening or closing the passage within the valve. There are a few different types of ball valves in the high purity industry that are specifically designed for applications that demand the highest levels of purity and cleanliness.

The series below are ball valves that are designed to meet the requirements of degreasing, low working pressure and bi-directional flow for the clean dry air (CDA) and bulk gas distribution line, which are widely used in specialty gas, semiconductor and chemical industries.

BGP Series

  • Working pressure up to: 1000 psig (69.0 bar)
  • Working temperature: -20 °F to 450 °F (-28 °C to 232 °C)
  • Orifice sizes: 0.18″ (4.6 mm) to 0.79″ (20.0 mm)
  • Standard average internal surface roughness Ra 15 μin. (0.38 μm)
  • Helium leak rate ≤1×10^-8 std cm^3 /s
  • Connection tube in customized length available

BHP Series

  • Working pressure up to: 3000 psig (207 bar)
  • Working temperature: -20 °F to 450 °F (-28 °C to 232 °C)
  • Orifice sizes: 0.18″ (4.6 mm) to 1.5″ (38.1 mm)
  • Standard average internal surface roughness Ra 15 μin. (0.38 μm)
  • Helium leak rate ≤1×10^-8 std cm^3 /s
  • End connection welded tube in customized length available
  • Pneumatic and electric actuator available

BDP Series

  • Working temperature: -20 °F to 450 °F (-28 °C to 232 °C)
  • Main line tube is full bore
  • Main line Tube with orbital welding
  • Branch ball valves are BHP series 3-piece high purity ball valves
  • Standard average internal surface roughness Ra 15 μin. (0.38 μm)
  • Main line tube and branch line ball valves available in different sizes

BRP Series

  • Working pressure up to: 1000 psig (69.0 bar)
  • Working temperature: -20 °F to 450 °F (-28 °C to 232 °C)
  • Orifice sizes: 0.19″ (4.8 mm) to 0.35″ (8.9 mm)
  • Standard average internal surface roughness Ra 15 μin. (0.38 μm)
  • Helium leak rate ≤1×10^-8 std cm^3 /s


High purity regulators are specialized devices used to precisely control the pressure of ultra-pure or high-purity gasses and fluids in various industrial applications. These regulators are designed to meet stringent purity and cleanliness standards, making them essential in industries like semiconductor manufacturing, biotechnology, pharmaceuticals, and high-tech manufacturing.

The FHR series regulator is a 316L stainless steel body for corrosive and toxic gasses with a standard Hastelloy poppet and tied diaphragm for added safety. This regulator has an internal surface roughness finished to an average of Ra 10 μin. (0.25 μm) or Ra 5 μin. (0.13 μm) to ensure minimal particle generation.



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