All Cylinder filling pumps. (Coro-Flo® Models and low flow side channel pumps)

The B166 is a combination bypass and priming valve specifically designed for small cylinder filling type pumps, especially of the regenerative turbine type, such as the Coro-Flo® pump series. The patented vapor elimination system keeps liquefied gas pumps primed to increase system reliability and decrease pump and seal wear. The B166 is a smooth operating bypass with moderate pressure buildup.

Corken B166

T166 (1-1/4", 1-1/2") PUMP FLOW CONTROL VALVE

Large capacity pumps filling variable size tanks and bottles such as those used with delivery trucks (Z-Series) or multi-spot cylinder-filling plants.

The T166 valve provides smooth-acting flow control. Specifically designed for bypass protection for pumps in the 30–100 gpm (6.8–22.7 m3/hr) range, such as those used on delivery trucks. In contrast to the B177, the T166 valve opens gradually as pressure builds up to modulate the flow, bypassing the excess capacity smoothly and silently back to the supply tank. A continuous internal bleed in this valve assists in eliminating vapors.

Corken T166

B177 (1-1/4", 1-1/2", 2", 2-1/2") DIFFERENTIAL BYPASS VALVE

In liquefied gas bulk plant installations for the loading and unloading pumps.

The B177 is a low-pressure buildup valve specifically designed for applications requiring protection for positive displacement pumps in the 40–350 gpm (9.1–-79.5 m3/hr) for smooth-acting flow control. To properly function, this valve requires a pressure sensing line for the storage tank. This valve should be applied where horsepower is limited and accuracy set points and flow points are necessary.

Corken B177


Used for both truck and stationary applications for loading and unloading.

The two-inch ZV200 is a low pressure build-up bypass valve designed for applications requiring protection for positive displacement pumps. Specifically designed for protecting pumps with capacities up to 250 gpm (946 L/min). The continuous internal bleed will assist in the operation of systems with "air" or "electric" operated internal valves. Typical applications include bobtail, transport and stationary loading and unloading of LPG, NH3 and other light liquids.

Corken ZV200

Features and Benefits

  • Dimensionally interchangeable with commonly used two-inch bypass valves; no need to change piping configuration.
  • Ductile iron construction offers maximum strength for higher pressures.
  • Flow rates up to 250 gpm (946 L/min) at 120 psi (8.3 bar) differential.
  • Continuous bleed helps equalize pressure to assist remote operated internal valves.
  • Multiple spring options enable you to select the pressure required for your truck or stationary application.