V-seals or chevron stacks deliver multi-element sealing in high-pressure valve stems and mandrels. Alternating elastomer and PTFE or Peek adapters create a stacked configuration that energizes under pressure. These seals accommodate large clearances and thermal expansion while preventing fluid ingress into tool internals https://globalsealstech.com/product-category/oil-gas-seals/downhole-completion-tools-seals/