Hydraulic Pressure Regulators

LF691

Low-Flow Hydraulic Pressure Regulator: Liquid / Piston / Ceramic Seat / Non- or Self-Venting / Max. Inlet: 1,380 bar (20,000 psi) / Max. Outlet: 1,380 bar (20,000 psi) / Cv 0.05, 0.1 or 0.3

* Basic Model LF691 LF691	* Cv Value 0.1 (max. inlet 1,034 bar / 15,000 psi) 0.1 (max. inlet 1,034 bar / 15,000 psi) 0.05 0.3 (max. inlet 1,034 bar / 15,000 psi)
* Body Material 316/316L Stainless Steel (Max. Inlet 1,034 bar / 15,000 psi) 316/316L Stainless Steel (Max. Inlet 1,034 bar / 15,000 psi) 17-4 PH Stainless Steel (Max. Inlet 1,380 bar - With Cv 0.05 Only) - Not suitable for H2	* Outlet Range Up to 50 bar (725 psi) Up to 50 bar (725 psi) Up to 100 bar (1,450 psi) Up to 140 bar (2,030 psi) - Air-Actuated Up to 200 bar (2,900 psi) Up to 414 bar (6,000 psi) Up to 600 bar (8,700 psi) - Air-Actuated Up to 690 bar (10,000 psi) Up to 1,034 bar (15,000 psi) Up to 1,080 bar (15,665 psi) Up to 1,380 bar (20,000 psi)
* O Ring HNBR HNBR NBR FKM/FPM	* Inlet / Outlet Connections 1/4" Medium Pressure 1/4" Medium Pressure 1/4" NPT 3/8" Medium Pressure 3/8" NPT 9/16" Medium Pressure 1/2" NPT
* Porting Configuration 11022000A 20001102A 10102000B 20001010B 10102010C 20101010C 22011010D 10102201D 22001010E 10102200E 20101000F 10002010F 10022000G 20001002G 10102020J 20201010J 10202020K 20201020K 10202000L 20001020L 11022201M 22011102M 10002000N 20001000N 11022020P 20201102P 11002001Q 20011100Q 11022001R 20011102R 11022010R3 20101102R3 22001000U 10002200U 22011000V 10002201V 00000000W 00000000W 10012000X 20001001X 11021020Y 10201102Y In Out Off
* Venting Options Self-Venting Self-Venting Non-Venting	* Mod No modification required No modification required Balanced Design

Part Order Number:

LF691 - 01 - S - 50S - H - 02A - A - SV -

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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 LF691...
The LF691 is a piston-sensed low-flow reducing regulator with ceramic seating to provide the ultimate protection against the harsh service encountered on water-based hydraulic applications such as water glycol. In addition, the LF691 offers a plug design for supply above 690 bar (10,000 psi).

Its unique seating cartridge ensures the main valve is fully supported during operation to prevent ‘chattering’. The LF691 is supplied with a segregated captured vent to prevent deterioration to the loading mechanism and allowing media to be piped off to the return tank.

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

APPLICATIONS:
• Wellhead logic and control systems
• Subsea valve actuator control
• Valve test rigs
• Liquid sampling
• Hydraulic power packs

FEATURES:
• Ceramic seat design
• Fully supported main valve
• Segregated captured vent
• Easy access to seat cartridge

Max. Rated Inlet Pressure
Outlet Ranges
Design Proof Pressure
Seat Leakage
Weight

1,380 bar (20,000 psi)
Up to 1,380 bar (20,000 psi)
150% max. working pressure
In accordance with ANSI/FCI 70-3
4.8kg (10.6lbs)

Datasheets:	LF691 (EN)
Service Instructions:	LF691 (EN)
Step File:	LF691-X-R-X-X-02A-N-X
GA Drawing:	LF691-05-S-690S-N-03A-N-SV-001
Other:	Image: 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

Hydraulic Pressure Regulators

LF691

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