Compact Shear & Seal Valve – CSS


CSS Overview

Unity’s CSS is a single ram BOP for intervention operations and forms an integral part of our compact, lightweight technology range. It provides a safe and reliable shear and seal mechanism for our Surface Intervention System rods, plus coiled tubing, slickline and wireline. Its ultra-compact form reduces heavy lifting, access hatch restrictions and stack-up height, significantly improving operational safety and efficiency.

An industry standard shear and seal method provides high shear load capacity, easy maintenance and ram replacement and reliable performance.

CSS Benefits

  • Universal – Shears and seals SIS rods, coiled tubing, wireline, slickline, e-line.
  • Lightweight – 50% lighter than conventional design
  • Modular – Single and dual rig up.
  • Compact Footprint – 33.5″ at its widest point.
  • Customisable – Replaceable rams for varying applications.
  • Easy to Maintain – Designed to easily access rams and seals for redress.

Specification - 5 1/8” CSS

Wellbore Pressure Rating (WP)

10,000 PSI

Operating Input Hydraulic Pressure (WP)

6,000 PSI


Temp Class U ( 18 C 121 C)


EE trim as standard

FF, HH on request

Dimensions (w,d,h)

33.5 ” x 19.75 ” x 21.25”


Top: 5 1/8” 6BX 10K Face mount

Bottom: 5 1/8” 6BX 10K Flange mount

Ring groove: BX 169 Type


2,100lbs (952 kg)

Coil Tubing Range

1.0” – 2-7/8” (80-130ksi)

Shear Rating

100,000 lbs

Shear Ram Position Indicator

*IP68 Inductive Limit Switch


API 6A PR1, API 16A, API 16ST, NACE MR0175