Flanged Check Valves

The DFT® Model GLC® Silent Check Valve is a spring-assisted, center guided, in-line, flanged check valve that provides reliable, low maintenance service for a wide range of fluids and pressure/temperature combinations. The valve consists of a body, seat, spring, disc with stem and guide bushing. Some valves have body or gasket seals. The DFT® GLC® check valve has the advantage of minimum pressure loss with silent, non-slam operation.

"Short" Face-To-Face Dimensions
Meets API 6D
API 6D and API 6FA Fire Test

ASME Class 150 and 300
2" to 24"

Meets API 6D
Standard Body Materials:

A216 Grade WCB Carbon Steel
A351 CF8M Stainless Steel

ASME Class 150 to 2500

1" to 42" Line Size
316 SS Trim
RF Flanged Ends
MSS-SP61 Seat Leakage

One-Piece Body
Spring-Assisted Silent Closing, Non-Slam
Center-Guided
Dual-Guided Stem
Horizontal or Vertical Installation

Unit of Measure

Items	952E1C4A3 A216 WCB 1" 316 SS Trim Class 600 RF GLC® Flanged Check Valve	952E1B4A3 A216 WCB 1" 316 SS Trim Class 300 RF GLC® Flanged Check Valve	955E1B4A3 A351 CF8M 1" 316 SS Trim Class 300 RF GLC® Flanged Check Valve	955E1A4A3 A351 CF8M 1" 316 SS Trim Class 150 RF GLC® Flanged Check Valve	955E1C4A3 A351 CF8M 1" 316 SS Trim Class 600 RF GLC® Flanged Check Valve
OLD PART #	N/A 9513	N/A 9509	N/A 9511	N/A 9505	N/A 9515
Series	N/A GLC®
Size	N/A 1.00 in
Cold Working Pressure	N/A 1480 psig	N/A 740 psig	N/A 720 psig	N/A 275 psig	N/A 1440 psig
Working Steam Pressure	N/A 1235 psig	N/A 620 psig	N/A 495 psig	N/A 180 psig	N/A 990 psig
ASME CLASS	N/A 600	N/A 300	N/A 300	N/A 150	N/A 600
Dimension A	N/A 5.25 in	N/A 4.75 in	N/A 4.75 in	N/A 4.50 in	N/A 5.25 in
Dimension B	N/A 4.88 in	N/A 4.88 in	N/A 4.88 in	N/A 4.25 in	N/A 4.88 in
Weight	N/A 11 lb	N/A 9 lb	N/A 9 lb	N/A 7.00 lb	N/A 11 lb
Cracking Pressure CP	N/A 0.85 psig0.059 bar
Body	N/A A216 Grade WCB	N/A A216 Grade WCB	N/A A351 CF8M	N/A A351 CF8M	N/A A351 CF8M
Body Material	N/A Carbon Steel	N/A Carbon Steel	N/A 316 Stainless Steel	N/A 316 Stainless Steel	N/A 316 Stainless Steel
Trim Material	N/A 316 SS
Seat¹	N/A 316 SS
Disc	N/A 316 SS
Spring²	N/A 316 SS
Bushing	N/A 316 SS
Gasketing³	N/A No Gasket in 1" & 1.5"- 150, 300, 600 Class
Available Soft Seat Materials⁴	N/A Buna-N (-70 to 250ºF) EPDM (-75 to 300ºF) TFE®-Viton® (-40 to 400ºF) Viton® (-40 to 400ºF) Zelon® (37 to 470ºF)
ENDS	N/A Flanged (RF)
ANSI	N/A B16.20 B16.34 B16.5
MSS⁵	N/A SP-125 (CAST IRON VALVES ONLY) SP-126 (EXCEPT CAST IRON VALVES) SP-25 SP-6 SP-61 (CLASS 125 & 250 CAST IRON VALVES)
ASTM⁶	N/A A126 CLASS B A216GR WCB A351GR CF8M
Cv	N/A 17	N/A 19	N/A 19	N/A 19	N/A 17
Other	N/A API 6D API 6FD (ASME CLASS 150/300, 2" to 24" Only) API PED (Except Cast Iron)
Temperature Rating	N/A -20 to 450 ºF	N/A -20 to 450 ºF	N/A -460 to 450 ºF	N/A -460 to 450 ºF	N/A -460 to 450 ºF
Applications	N/A Autoclaves Boiler Feed & Discharge Chemical Lines Condensate Lines Cookers Cooling Towers Crude & Refined Product Lines Cryogenics Digester Evaporators Fly Ash System Generator Inlet & Discharge Hydraulic Lines Metering Pumps Mine Dewatering Process Lines Pump Discharge Refrigeration Steam Lines Vacuum Breaker Water Lines Water Treatment
¹ Soft seats are available for bubble-tight shutoff. ² Inconel® X-750 spring is available. ³ CFG Corrugated flexible graphite (316 graphite material) (Class 150 & 300), 316 SS/Graphite Spiral Wound (Class 600 & up). ⁴ TFE-Viton: Teflon Encapsulated Viton ⁵ SP-61: Class 125 and 250 Cast Iron valves are leak tested in accordance with AWWA. SP-125, SP-250: Cast Iron Valves only. SP-126: Except Cast Iron Valves. ⁶ API 6D, API 6FA: ASME 150 & 300, 2" to 24" only. Contact DFT for NACE.