Process control systems and associated monoflanges

A monoflange and primary block valve assembly for use with a process control system having a fluidic line, the assembly comprising:

• a primary block valve having an inlet port and an outlet port, the inlet port of the primary block valve arranged for coupling to the fluidic line;
• a monoflange having a male portion forming an inlet port and comprising an external threaded surface, the male portion sized to be operatively coupled to the outlet of the primary block valve, thereby placing the inlet port of the male portion of the monoflange in flow communication with outlet port of the primary block valve;
• the monoflange further including:
• an outlet port;
• a flanged interface surrounding the outlet port of the monoflange;
• a bleed port,
• a bleed valve having a valve seat disposed within and integral with a body of the monoflange and adapted to control fluid flow to the bleed port, the bleed valve having a bonnet flange mounted directly to the monoflange by a first threaded connection;
• and
• a secondary block valve having a valve seat disposed within and integral with the body of the monoflange and adapted to control fluid flow from the outlet port of the monoflange, the secondary block valve having a bonnet flange mounted directly to the monoflange via a second threaded connection;
• and
• wherein the inlet port of the monoflange is operatively coupled to the outlet port of the primary block valve via the external threaded surface of the male portion.

A method comprising:

• threadably engaging an outlet port of a primary block valve with an external threaded surface of a male portion of a monoflange, the primary block valve having an inlet port coupled to a fluidic connection of a fluidic line, the monoflange comprising the male portion forming an inlet port, a flanged interface surrounding an outlet port of the monoflange, and a bleed port, the monoflange further comprising a bleed valve and a secondary block valve;
• actuating the secondary block valve to control fluid flow from the outlet port of the monoflange;
• and
• actuating the bleed valve to control fluid flow from the bleed port;
• providing the bleed valve with a valve seat disposed within and integral with a body of the monoflange and adapted to control fluid flow to the bleed port, the bleed valve having a bonnet flange, and joining the bleed valve directly to the monoflange by a first threaded connection;
• and
• providing the secondary block valve with a valve seat disposed within and integral with the body of the monoflange and adapted to control fluid flow from the outlet port of the monoflange, the secondary block valve having a bonnet flange, and mounting the bonnet flange directly to the monoflange via a second threaded connection.