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Olab - Testata

SERIES 33000-2

CHECK VALVE FOR PROFESSIONAL A3-A2L REFRIGERATION SYSTEMS WITH PTFE SEAL, OLAB CERTIFIED 100% PFAS-FREE HNBR O.RING AND TEFLON SHEET

SERIES 33000-2
UL

Category: A3-A2L SPECIALIST

Notes:

  • PS: 45 BAR (652 psi)
  • TS: -40°C ÷ +150°C (-40°F ÷ +302°F)
  • 100% PFAS-FREE OLAB CERTIFIED HNBR
  • LOW-PFAS IMPACT COMPONENT
  • CERTIFICATIONS: UL 207

Technical Data Sheet

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Description

The Series 33000-2 check valve by OLAB is engineered to deliver maximum safety, durability, and sealing performance in professional A3–A2L refrigeration systems using hydrocarbon (HC) refrigerants. Its body is made of high-strength yellow brass, ensuring robust performance even under extreme operating conditions. The sealing element combines PTFE and HNBR 100% PFAS-FREE, certified by OLAB, applied on rubber-coated steel to maintain perfect tightness under thermal and mechanical stress.

Available in three calibrated differential opening pressure options (0.1 – 0.3 – 1.5 bar), the valve adapts precisely to the specific requirements of each system, offering consistent reliability over time. Each valve is individually tested with pure helium in a dedicated OLAB facility. Laser-marked with date and serial number, each unit guarantees lifetime traceability of its tested performance.

Series 33000-2 is UL 207 certified, meets the most stringent standards, and is part of the OLAB LOW-PFAS IMPACT COMPONENTS range—designed for a more sustainable future without compromising safety or performance.
 romising safety or performance.

Main features

Technical features:

  • Check valve series
  • Yellow brass body
  • Seal in PTFE and OLAB-Certified 100% PFAS-FREE HNBR over metal sheet
  • Designed for professional A3-A2L refrigeration systems

Applications

COMPATIBLE A3–A2L REFRIGERANT GASES

HFC, HFO, and HFO/HFC blends: R404A, R407C, R410A, R507, R32, R134a (up to +125°C / 257°F).
HFO and HFO/HFC blends: R1234ze, R448A, R449A, R450A, R452A, R1234yf.
HC: R290, R600, R600a.

Products equipped with HNBR seals must not be installed on systems using HCFCs (R22) or any refrigerants mixed with mineral oils or alkylbenzene lubricants.

Our HNBR compound seals have been specifically designed and manufactured for compatibility with A3 and A2L refrigerant gases (as defined in ASHRAE Standard 34). However, due to the countless variables involved in real-world applications—such as pressure, temperature, and mixing ratios—an application-specific validation on the system is always required.

Components

RELIABLE DURABILITY
Body made of yellow brass, engineered to ensure strength and long-term resistance even under demanding conditions.

SECURE AND CONSISTENT SEALING
Sealing element in PTFE and OLAB-Certified 100% PFAS-FREE HNBR over metal sheet, providing perfect airtightness in all conditions.

OPTIMIZED FOR HC REFRIGERANTS
Designed for professional refrigeration systems using hydrocarbon refrigerants (HC).

TAILORED OPENING PRESSURES
Available with differential opening pressures of 0.1 – 0.3 – 1.5 bar, to meet various system requirements.

100% HELIUM TESTED
Each unit is individually tested in a state-of-the-art helium facility. Date and serial number are engraved to certify compliance and allow full traceability of recorded performance data.

Description Main features Applications Components

The Series 33000-2 check valve by OLAB is engineered to deliver maximum safety, durability, and sealing performance in professional A3–A2L refrigeration systems using hydrocarbon (HC) refrigerants. Its body is made of high-strength yellow brass, ensuring robust performance even under extreme operating conditions. The sealing element combines PTFE and HNBR 100% PFAS-FREE, certified by OLAB, applied on rubber-coated steel to maintain perfect tightness under thermal and mechanical stress.

Available in three calibrated differential opening pressure options (0.1 – 0.3 – 1.5 bar), the valve adapts precisely to the specific requirements of each system, offering consistent reliability over time. Each valve is individually tested with pure helium in a dedicated OLAB facility. Laser-marked with date and serial number, each unit guarantees lifetime traceability of its tested performance.

Series 33000-2 is UL 207 certified, meets the most stringent standards, and is part of the OLAB LOW-PFAS IMPACT COMPONENTS range—designed for a more sustainable future without compromising safety or performance.
 romising safety or performance.

Technical features:

  • Check valve series
  • Yellow brass body
  • Seal in PTFE and OLAB-Certified 100% PFAS-FREE HNBR over metal sheet
  • Designed for professional A3-A2L refrigeration systems

COMPATIBLE A3–A2L REFRIGERANT GASES

HFC, HFO, and HFO/HFC blends: R404A, R407C, R410A, R507, R32, R134a (up to +125°C / 257°F).
HFO and HFO/HFC blends: R1234ze, R448A, R449A, R450A, R452A, R1234yf.
HC: R290, R600, R600a.

Products equipped with HNBR seals must not be installed on systems using HCFCs (R22) or any refrigerants mixed with mineral oils or alkylbenzene lubricants.

Our HNBR compound seals have been specifically designed and manufactured for compatibility with A3 and A2L refrigerant gases (as defined in ASHRAE Standard 34). However, due to the countless variables involved in real-world applications—such as pressure, temperature, and mixing ratios—an application-specific validation on the system is always required.

RELIABLE DURABILITY
Body made of yellow brass, engineered to ensure strength and long-term resistance even under demanding conditions.

SECURE AND CONSISTENT SEALING
Sealing element in PTFE and OLAB-Certified 100% PFAS-FREE HNBR over metal sheet, providing perfect airtightness in all conditions.

OPTIMIZED FOR HC REFRIGERANTS
Designed for professional refrigeration systems using hydrocarbon refrigerants (HC).

TAILORED OPENING PRESSURES
Available with differential opening pressures of 0.1 – 0.3 – 1.5 bar, to meet various system requirements.

100% HELIUM TESTED
Each unit is individually tested in a state-of-the-art helium facility. Date and serial number are engraved to certify compliance and allow full traceability of recorded performance data.