Swagelok SS-8BK-1C straight pattern bellows sealed valve uses a packless design and a welded seal to isolate system fluids and achieve reliable, leak-tight performance. Equipped with a normally closed (NC) 1 Series pneumatic actuator and featuring special SC-11 cleaning and packaging, it is ideal for applications where the seal to atmosphere is critical. Multiple options are supported for general and high-purity service.

Restriction

Do not mix/interchange Swagelok products or components not governed by industrial design standards, including Swagelok tube fitting end connections, with those of other manufacturers.

Specifications

Specifications
Actuator Model	1 Series
Actuator Operation Mode	Normally Closed Spring Return
Actuator Type	Pneumatic
Bellows Material	321 Stainless Steel
Body Material	316 Stainless Steel
Body Seal	Gasket with soft seat
Cleaning Process	Special Cleaning and Packaging (SC-11)
Connection 1 Size	1/2 in.
Connection 1 Type	Swagelok® Tube Fitting
Connection 2 Size	1/2 in.
Connection 2 Type	Swagelok® Tube Fitting
CV Maximum	0.96
Flow Pattern	Straight (2-way)
Gasket	PTFE-Coated 316 SS Gasket
Maximum Temperature, °F (°C)	200 (93)
Max Temperature Pressure Rating	200°F @ 125 PSIG / 93°C @ 8.6 BAR
Minimum Temperature, °F (°C)	-20 (-28)
Room Temperature Pressure Rating	125 PSIG @ 100°F / 8.6 BAR @ 37°C
Service Class	General
Stem Tip Material	PCTFE
Stem Type	Conical
Surface Finish	Standard
Testing	Helium leak testing according to SCS-00020
eClass (4.1)	37010201
eClass (5.1.4)	37010201
eClass (6.0)	37010201
eClass (6.1)	37010201
eClass (10.1)	37010201
UNSPSC (4.03)	40141600
UNSPSC (10.0)	40141609
UNSPSC (11.0501)	40141609
UNSPSC (13.0601)	40141609
UNSPSC (15.1)	40141609
UNSPSC (17.1001)	40183102