Inline Self-Resetting Valves

Inline Self-Resetting Valves

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Product Introduction

 
WANAN self-reset sampling valve (model: WA-ZF series) is a hermetically sealed, automatic reset and anti-leakage sampling device specially designed for petroleum, chemical, environmental protection and other working conditions. Adopting spring automatic reset and dual-channel flow structure, it is widely used for safe sampling of high-temperature, high-pressure and corrosive media.
 

Working Principle

 
  1. Opening: Manually press or rotate the handle to lift the valve core, opening the main flow path and sampling port for medium sampling.
  2. Automatic Reset & Closing: After releasing the handle, the built-in high-strength spring instantly resets the valve core, realizing double sealing of the main passage and sampling port with zero leakage and no residue.
  3. Safety Design: Equipped with vent / drain port for purging before sampling and residual discharge after sampling to avoid cross contamination.
 

Main Specifications

 
  • Body Material: CF8 (304), CF8M (316L) stainless steel, forged structure
  • Reset Mechanism: Built-in stainless steel spring, service life ≥ 100,000 cycles
  • Seal Material: PTFE, EPDM, FKM (Viton), high temperature and corrosion resistance
  • Operating Temperature: -20℃ ~ 220℃
  • Pressure Rating: PN16, PN25, PN40, PN64 (high pressure customizable)
  • Connection Types: Flanged, threaded, clamped (tri-clamp), welded
  • Nominal Diameter: DN10, DN15, DN20, DN25, DN32, DN40, DN50
  • Surface Treatment: Sand blasting, mechanical polishing, electrolytic polishing (Ra ≤ 0.8μm for hygienic grade)

Selection Guide

  • – Corrosive media: Choose 316L + PTFE
  • – General media: Choose 304 + EPDM
  • – High temperature: Choose PTFE or FKM
  • – Hygienic application: Choose 316L with tri-clamp connection
  • – Easy-crystallizing media: Choose jacketed insulated type
Inline Self-Resetting Valves - Self Resetting Samplers | Wanan Technology
Inline Self-Resetting Valves - Product Photo (Self Resetting Samplers) | Wanan Technology
self-resetting valve Sampling sytem with cooler
Inline Self-Resetting Valves - Self Resetting Samplers | Wanan Technology

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FAQ

A closed loop sampler is a safety device used to collect liquid samples from pipelines or storage tanks without exposing operators to hazardous chemicals. Wanan closed loop samplers comply with API MPMS 8.2 standard and feature a sealed design that returns purge fluid back to the process, eliminating VOC emissions.

Wanan flame arrestors are certified to ISO 16852, ATEX (European Explosive Atmospheres Directive), and EN 12874 standards. We provide type test reports for IIA, IIB, and IIC gas groups. All products are manufactured in our ISO 9001:2015 certified facilities.

Yes. Wanan Technology is a registered qualified supplier for Sinopec, PetroChina, CNOOC (China), ExxonMobil, LukOil (Russia), ENI (Italy), KazMunayGas (Kazakhstan), and PDVSA (Venezuela), among others.

Wanan Technology has manufacturing facilities in Germany, USA, and China. We also have inventory and sales service centers in UAE to serve Middle East and global customers with fast delivery.

Wan’an Technology’s closed sampler is suitable for liquid sampling scenarios involving toxic and hazardous media in petrochemical, natural gas, oil refinery, and tank farm industries. It complies with API MPMS 8.2 standards, prevents operators from coming into contact with hazardous substances, and meets HSE environmental emission requirements.

A: Standard products ship within 2-4 weeks from order confirmation. Custom-engineered solutions typically require 6-8 weeks depending on specification complexity. For urgent projects, we offer expedited production upon request — contact our sales team with your timeline and we will work out a schedule.

A: Our products comply with major international standards including ISO 3170 (petroleum sampling), API MPMS 8.1/8.2, ATEX for explosive atmospheres, ASME, and EAC. DOT and TPED certifications are available for sample cylinders. We provide full certification documentation and material test certificates with every order.

A: Yes. We offer sample units for evaluation purposes. Upon approval, we ship one or two units so you can verify compatibility with your application, materials, and site conditions before committing to a volume order. Shipping costs may apply depending on destination.