Special application manifold – Trifold Rotofold Pentafold
Trifold Needle Valve Manifold
The HOKE 3–Valve Trifold manifold is designed for direct mounting to differential pressure transmitters having 2.125 inches (54 mm) center-to-center process connections.
Pipe by Flange
When direct coupling to orifice plate flanges is not desired, the pipe by flange Trifold Manifold allows for two ½” NPT process connections in addition to direct mounting of the transmitter.
Flange by Flange
When direct coupling to orifice plate flanges is required, the flange by flange Trifold Manifold mounts directly between the flange and the transmitter. If direct coupling to orifice plate flanges is not required, process futbol connectors may also be used.
Rotofold Ball Valve Manifold
The HOKE Rotofold ball valve manifold has a unique design that utilizes quarter turn ball valves for blocking process impulse lines and performing equalizing functions. They also provide easy rod though of all passages when clean-out is necessary. PCTFE seats and PTFE stem packing are easily replaced if maintenance is required. The pipe by flange Rotofold design allows the manifold to be directly mounted to integral orifice transmitters by simply reversing the flanges and flange fittings. The pipe by pipe Rotofold design allows the manifold to be remotely mounted separately from the process.
Pentafold 5–Valve Manifold
The HOKE Pentafold 5-valve manifold is specifically designed for use with differential pressure transmitters when applied to gas flow measurement. This manifold design uses two PCTFE seated ball valves and three needle valves with non-rotating PCTFE stem tips as bypass or equalizing valves and vent valves. The two by-pass valves assure no leakage across the high and low side of the orifice meter for critical gas flow measurement. The pipe by pipe Pentafold design allows the manifold to be mounted away from the process but close to a differential pressure transmitter through the use of impulse piping.