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Small black rubber O-ring for gas ballast trap

Value Brand

Value Brand PR-211 Trap O-Ring Gas Ballast fan accessory

SKU CH-JCJE-XYTC8

Replacement O-ring for gas ballast traps on compatible JB Industries vacuum pumps

  • Product typeClosed Base
  • Ensures airtight seal with compatible JB Industries vacuum pumps
  • Fits DV-42N, DV-85N, DV-142N, DV-200N and DV-285N series models
  • Replaces Grainger parts 1RK23, 1RK24, 2NV91 and 3WU95
  • Matches Grainger references 35Y855, 35Y856, 35Y858, 35Y859 and 42653949
  • Closed-base design installs directly on gas ballast trap assembly

Compatible Pump Models

This O-ring fits JB Industries DV-series pumps including the DV-42N, DV-85N, DV-142N, DV-200N and DV-285N. It also matches Grainger part numbers such as 1RK23, 1RK24 and the 35Y series. The closed-base design suits standard gas-ballast ports on these units. Buyers with other pump brands or series should verify fitment before ordering.

Gas-Ballast Seal Function

The single specification that decides fit is the closed-base O-ring profile made for the gas-ballast trap on compatible DV pumps. It provides the seal that prevents air leakage during evacuation. If your pump uses a different trap style or thread size this part will not seat correctly.

Thermals Noise and Power

As a static rubber seal this accessory generates no heat, noise or electrical draw. It does not affect the pump’s operating temperature or sound level. Installation simply replaces the worn O-ring during routine maintenance.

How it compares

Measured against everything we stock in Fan Motors, Parts & Clip-On Fans, at today’s prices. Recalculated every night.

Price $2.99
Cheaper than about 99% of the 473 comparable items (median $38.99).

Specifications

Product
Brand nameJB INDUSTRIES
Product typeClosed Base

Questions about this item

What does the PR-211 trap O-ring actually seal inside a JB Industries vacuum pump?

It forms the gas-ballast seal on compatible DV-series pumps, letting a controlled amount of air into the second stage to prevent vapour condensation and protect the oil.

Which pump models does the PR-211 O-ring fit?

It fits JB Industries DV-42N, DV-85N, DV-142N, DV-200N and DV-285N vacuum pumps, matching Grainger part numbers 1RK23, 1RK24, 2NV91, 35Y855, 35Y856, 35Y858, 35Y859, 3WU95 and 42653949.

What physical detail must I check before installing the PR-211 O-ring?

Verify the gas-ballast port uses a closed-base O-ring seat; the PR-211 is a closed-base design and will not seal on an open-base port.

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