Back Pressure Regulators

BP-LF691

Low-Flow Back Pressure Regulator: Gas or Liquid / Piston / Max. Rating: 1,034 bar (15,000 psi) / Control Range: Up to 900 bar (13,050 psi) / Cv 0.1 or 0.02

* Basic Model BP-LF691G (Gas) BP-LF691G (Gas) BP-LF691H (Liquid)	* Cv Value 0.1 0.1 0.02
* Body Material 316/316L Stainless Steel 316/316L Stainless Steel 17-4PH Stainless Steel - Not suitable for H2	* Control Range Up to 600 bar (8,700 psi) Up to 600 bar (8,700 psi) Up to 690 bar (10,000 psi) Up to 900 bar (13,025 psi) - 17-4 Stainless Steel Body Material Required
* O Ring NBR NBR FKM/FPM	* Inlet / Outlet Connections 1/4" MP 1/4" MP 1/4" NPT 3/8" MP 3/8" NPT 9/16" MP 1/2" NPT
* Porting Configuration BL

Select Porting Configuration

Part Order Number:

BPLF691G - 01 - S - 600A - N - 02A - BL

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For further information about this product, please contact:
	Phone: +44 (0)1457 899307 Email: sales@pressure-tech.com

VIEW ACCESSORIES

See example of accessories typically ordered with this product.

INTRODUCING THE BP-LF691...
The BP-LF691 is a piston-sensed low-flow back pressure regulator for gas or liquid applications. As standard, the gas version includes a PEEK™ seat, whilst the liquid version features 316SS seating. Alternatively, other seats are available to suit your application including Titanium, Vespel® and Hastelloy®.

The BP-LF691 accurately controls inlet pressure and vents excess pressure back via the threaded 1/2" NPT / BSP or 9/16" MP outlet port.

PLEASE CONTACT THE PRESSURE TECH OFFICE IF YOUR ORDER HAS ANY SPECIAL MODIFICATIONS OR REQUIREMENTS.

APPLICATIONS:
• Chemical injection systems
• Valve test rigs
• Liquid sampling
• Supercritical liquid

FEATURES:
• Piston-sensing element
• Range of seat materials
• Optional air actuator
• Low Cv (0.02)

Max. Rated
Control Range
Design Proof pressure
Seat Leakage
Weight

1,034 bar (15,000 psi)
Up to 900 bar (13,050 psi)
150% max. working pressure
In accordance with ANSI/FCI 70-3
2.9kg (6.4lbs)

Datasheets:	BP-LF691 (English)
Service Instructions:	BP-LF691 (English)
Step File:	BP-LF691G-01-S-900S-E-02A-N
Other:	Image: BP-LF691

Accessories

PT-C-061-003-RING & PT-C-061-003-001-RING
Panel Mount Ring: Stainless Steel or Aluminium / Suitable for Bodies with 65mm Diameter / Used on BP-LF550, BP-LF690, BP-MF690 (05), BP-MF690 (15), LF-690, LF-691, LF-692 and MF-414

Back Pressure Regulators

BP-LF691

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